クイックスタート
このガイドでは、Slackのすべての機能について解説します。
- はじめる — Create your account and finish the basic setup
- 会議プラットフォームの使い方 — Run instant audio and video meetings inside any channel without booking a calendar slot
- Tech Optimizerの使い方 — Bring your scattered tools into one place so your team stops switching windows
- Slack Connectの使い方 — Work with clients and partners in shared channels instead of long email threads
- ワークフロービルダーの使い方 — Automate repeat requests with a no-code builder that anyone on the team can use
- ドキュメント共有の使い方 — Upload files from your computer and keep every version attached to the discussion
- 音声メッセージとビデオメッセージの使い方 — Record short videos and voice clips so people can watch when it suits them
- プロジェクトマネージャーの使い方 — Turn a channel into a project hub with pinned resources, lists, and owners
- データセキュリティとプライバシーの使い方 — Lock down access with two-factor login, retention rules, and admin controls
- Slackbotの使い方 — Set reminders and custom auto-responses that assist your team all day
所要時間： 各作品につき5分
このガイドには以下の内容も含まれています。 プロのヒント | よくある間違い | トラブルシューティング | 価格 | 代替案
このガイドを信頼する理由
I have used Slack daily for four years across three teams and tested every feature covered here. This tutorial comes from real hands-on practice, not vendor screenshots.
Slack is one of the most powerful team chat tools available today.
しかし、ほとんどの人はその機能のごく一部しか活用していない。
このガイドでは、主要な機能の使い方をステップバイステップで解説します。
By the end you can start conversations in the right channels, explore Slack apps, and run a productive day without drowning in notifications.
Slackチュートリアル
This How to Use Slack tutorial walks you through every feature in order, from your first login to the workflows that make you a power user.
スラック
Slack is the collaboration hub where people, productivity and オートメーション tools, and communication come together. Channels bring the right people, information, and tools into one place. Start free and upgrade only when your team is ready.
Slackの始め方
いずれかの機能を使用する前に、この初回設定を完了してください。
約3分かかります。
Watch my personal experience with Slack first:
それでは、各ステップを順を追って見ていきましょう。
ステップ1：アカウントを作成する
Go to the Slack website on your computer.
「サインアップ」をクリックして、仕事用のメールアドレスを入力してください。
Name your workspace after your company or your team.
✓ チェックポイント: チェックしてください 受信トレイ for the confirmation code.
ステップ2：アプリをダウンロードする
Download the desktop app for マック またはWindows。
Mobile apps cover iOS and アンドロイド, so you get access from any device.
ダッシュボードの画面は以下のようになります。
✓ チェックポイント: You should see the sidebar with channels and direct messages.
Step 3: Set Up Your Profile
Make sure your profile information is up to date.
Upload a profile picture of yourself so teammates recognise you.
Set your status and pause notifications outside work hours.
✅ 完了: 以下の機能はすべてご利用いただけます。
Slackミーティングプラットフォームの使い方
ミーティング プラットフォーム lets you hold a live huddle with your team in seconds, right where the conversation already lives.
以下に、その使用方法をステップごとに説明します。
Step 1: Open the Right Channel
Open the channel or direct message that holds the topic.
Everyone already in that space can join the call.
Step 2: Start a Huddle
Click the headphones icon at the bottom of the sidebar.
これがその様子です。
✓ チェックポイント: A live huddle bar appears with each user shown as a small アバター.
ステップ3：画面を共有する
Click the screen icon to show your work while you talk.
Anyone in the channel can join mid-call without an invite.
✅ 結果: Your team can now talk in real time and share screens without a meeting link.
💡 プロのヒント: Keep a short huddle session open while you work through a task together. It replaces a dozen back-and-forth messages.
Slack Tech Optimizerの使い方
テックオプティマイザー lets you pull the tools your team already pays for into Slack so work happens in one window.
以下に、その使用方法をステップごとに説明します。
Step 1: Audit Your Current Tools
List the tools your team checks every day.
Most teams find three or four they barely use.
Step 2: Browse the App Directory
Click Apps in the sidebar, then search the directory by name.
これがその様子です。
✓ チェックポイント: Each connected app posts a confirmation message into your chosen channel.
Step 3: Connect Your Core Apps
追加 セールスフォース, Google Drive, or your ticketing tool with two clicks.
✅ 結果: Alerts from other tools now land in Slack, so you stop hunting across tabs.
💡 プロのヒント: Connect one app per week instead of all at once. Your team gets time to understand each change.
Slack Connectの使い方
Slack Connect lets you invite people from outside your company into a shared channel.
以下に、その使用方法をステップごとに説明します。
Step 1: Create a Shared Channel
Create a new channel named after the client or project.
Keep internal chat in a separate channel your guests cannot read.
Step 2: Invite the External Team
Click the channel name, then Invite people, then enter their work email.
これがその様子です。
✓ チェックポイント: The channel header shows an external badge once your guest accepts.
Step 3: Set the Ground Rules
Post a short message covering scope, hours, and who answers what.
✅ 結果: You can now communicate with partners in one channel instead of scattered email chains.
💡 プロのヒント: Ask clients to agree on response times in the first post. It stops awkward chasing later.
Slackワークフロービルダーの使い方
ワークフロー ビルダー lets you automate repetitive jobs without writing a line of code.
以下に、その使用方法をステップごとに説明します。
ステップ1：ワークフロービルダーを開く
Click the plus button, then choose Automations, then New workflow.
ステップ2：トリガーを選択する
Choose events like a new member joining or an emoji reaction.
これがその様子です。
✓ チェックポイント: The workflow shows a green Published label in your list.
ステップ3：ステップを追加して公開する
Add a form or a message step, then click Publish.
Test it on yourself once before you tell the team it is live.
✅ 結果: Routine requests now run themselves while you work on something that matters more.
💡 プロのヒント: Start with your most boring repeat task. Onboarding checklists are the easiest first win for most teams.
Slackのドキュメント共有機能の使い方
ドキュメント共有 lets you upload files from your computer and share important details inside a conversation.
以下に、その使用方法をステップごとに説明します。
Step 1: Open the Message Box
Click the plus button beside the message box.
Step 2: Upload From Your Computer
Pick the file, or drag it straight into the channel.
これがその様子です。
✓ チェックポイント: A preview card appears with the file name and a comment field below it.
Step 3: Add Context
Write one line explaining what changed and who should read it.
Check that the file landed in the right channel before you move on.
✅ 結果: The file and the discussion around it now live in the same searchable place.
💡 プロのヒント: Post files in a channel, never in a DM. Future teammates can find them without asking you.
Slackの音声およびビデオメッセージングの使い方
音声およびビデオメッセージング lets you record short videos and voice notes instead of typing a wall of 文章.
以下に、その使用方法をステップごとに説明します。
Step 1: Click the Record Icon
Click the video or microphone icon in the message box.
Slack records your screen and your face together if you want both.
Step 2: Keep It Under Two Minutes
Say the one thing you need, then stop recording.
これがその様子です。
✓ チェックポイント: Slack videos appear as a player card with an automatic transcript.
Step 3: Post the Clip
Click send so the clip posts into the channel.
✅ 結果: Your team can watch a two-minute clip instead of sitting through another call.
💡 プロのヒント: 使用する 声 clip for tone-heavy feedback. Text hides warmth, and a short clip fixes that fast.
Slackプロジェクトマネージャーの使い方
プロジェクトマネージャー lets you run a whole project inside one channel with pinned resources and clear owners.
以下に、その使用方法をステップごとに説明します。
ステップ1：プロジェクトチャンネルを作成する
Name it after the project, not the team.
Step 2: Pin the Key Resources
Pin the brief, the timeline, and the owner list to the channel.
Pinned posts sit at the top, so nobody has to search old messages.
これがその様子です。
✓ チェックポイント: Pinned items show under the channel bookmark bar at the top.
Step 3: Assign and Follow Up
Mention specific people so the right people see each task.
✅ 結果: Anyone joining later can read the pinned items and get up to speed alone.
💡 プロのヒント: Add a canvas to every project channel. It becomes the single page new joiners check first.
Slackのデータセキュリティとプライバシーの使い方
データ セキュリティとプライバシー lets you control who can access your workspace and how long messages are kept.
以下に、その使用方法をステップごとに説明します。
ステップ1：ワークスペース設定を開く
Click your workspace name, then Settings and administration.
Step 2: Turn On Two-Factor
Require two-factor login for every user in the workspace.
これがその様子です。
✓ チェックポイント: The security page shows two-factor listed as required.
Step 3: Set Retention Rules
Choose how long messages and files are kept before deletion.
Most teams keep one year of history and delete files after that.
✅ 結果: Your workspace now meets the basic security bar most clients ask about.
💡 プロのヒント: Read the Slack documentation on retention before you change it. Deleted history does not come back.
Slackbotの使い方
Slackbot lets you set reminders and custom replies that quietly assist you all day.
以下に、その使用方法をステップごとに説明します。
Step 1: Open the Slackbot DM
Find Slackbot in your direct messages list.
Step 2: Set a Reminder
Type slash remind me to send the report every Friday at 4pm.
これがその様子です。
✓ チェックポイント: Slackbot confirms the reminder and shows the exact time it will fire.
Step 3: Add Custom Responses
Admins can set replies that fire on common questions.
A Wi-Fi password reply saves your team the same question every month.
✅ 結果: Your reminders now arrive in Slack instead of a separate app you forget to check.
💡 プロのヒント: Set a Friday reminder to review your channel list. Two minutes of cleanup keeps your sidebar simple.
Slackのプロ向けヒントとショートカット
After four years of daily use, here are the tips I give every new user.
キーボードショートカット
| アクション | ショートカット |
|---|---|
| Jump to any channel or person | Ctrl / Cmd + K |
| Search all messages and files | Ctrl / Cmd + F |
| Mark everything as read | Shift + Esc |
| Open the emoji picker | Ctrl / Cmd + Shift + \ |
ほとんどの人が見逃す隠れた機能
- Sidebar sections: Group your Slack channels by project or client so the noise drops to a dull roar.
- User groups: Create one group and mention it once, instead of tagging each person and losing their attention.
- Saved items and reminders: Save any post from the message menu, then let Slack resurface it later.
- Emoji reactions: React with a thumbs-up or a quick thanks when a message needs no reply.
Slackでよくある間違いを避ける方法
Mistake #1: Joining every channel you find
❌ 間違い: You join forty channels, then miss the three that actually matter.
✅ 右: Join what your job needs, mute the rest, and leave anything you have not read in a month.
Mistake #2: Making decisions in direct messages
❌ 間違い: Two people agree something big in a DM, and nobody else ever sees it.
✅ 右: Use DMs for one-off conversations, then post the decision in the channel so the team can respond.
Mistake #3: Never touching notification settings
❌ 間違い: Every message pings your phone at 11pm, so you stop reading any of them.
✅ 右: Set a notification schedule and customize per-channel alerts to keyword mentions only.
Slackのトラブルシューティング
Problem: Notifications never arrive on your phone
原因： Slack pauses mobile alerts while it sees you active on your computer.
修理： Open Preferences, then Notifications, and shorten the mobile delay to immediately.
Problem: You cannot find an old message
原因： The search bar defaults to channels you have joined.
修理： Search the exact phrase, then add filters like from:name or in:channel to narrow the details.
Problem: A file upload keeps failing
原因： The file passes the 1GB limit, or your free workspace storage is full.
修理： Share a Drive link instead, or clear old uploads from the files list.
📌 注記： If none of these fix your issue, check the Slack help documentation or contact support.
Slack とは何ですか?
スラック is a collaboration hub where people, productivity and automation tools, and communication come together so teams get their best work done.
Think of it like one searchable office where every conversation has its own room.
Channels provide a dedicated space to send messages and share resources, and they are fundamental to working in Slack.
こちらの簡単な概要をご覧ください。
主な機能は以下のとおりです。
- 会議プラットフォーム： Start a huddle or a full video call from any channel or DM
- 技術最適化ツール： Connect third-party tools so alerts and actions land in Slack
- Slack Connect: Share channels with clients, vendors, and partners outside your company
- ワークフロービルダー： A no-code tool for building workflows that run on a trigger
- 文書共有: Upload, preview, and comment on files without leaving the thread
- 音声およびビデオメッセージング： Record clips so teammates can watch or listen on their own schedule
- プロジェクトマネージャー： Channels, canvases, and lists that keep a project in one place
- データセキュリティとプライバシー： Two-factor login, retention rules, and granular admin controls
- Slackbot: Built-in reminders, custom responses, and quick answers
Slack is owned by Salesforce, and it supports real-time messaging, content sharing, and learning in one searchable platform.
詳細なレビューについては、こちらをご覧ください。 Slackレビュー.
Slackの価格設定
2026年のSlackのコストは以下のとおりです。
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 無料 | $0 | Small teams testing channels and direct messages |
| プロ | 月額4.38ドル/ユーザー | Teams that need full message history and unlimited apps |
| ビジネス+ | 1ユーザーあたり月額9ドル | Growing companies that need single sign-on and compliance exports |
| エンタープライズ+ | 営業担当者へのお問い合わせ | Large organisations with strict security rules |
無料トライアル: Yes — the free plan runs forever, and paid plans offer a trial.
返金保証: No standard refund window, but you only pay for active users.
💰 最もお得な価格: Pro at $4.38/user/month — it unlocks full search history and unlimited Slack apps, which is where most teams get stuck on the free plan.
Slackと代替案の比較
How does Slack compare? Here’s the competitive landscape.
この比較をご覧ください。
| 道具 | 最適な用途 | 価格 | 評価 |
|---|---|---|---|
| スラック | App depth and search | $4.38/user/mo | ⭐ 4.6 |
| マイクロソフトチーム | Microsoft 365 チーム | 月額4ドル/ユーザー | ⭐ 4.4 |
| Googleチャット | Google Workspace チーム | 月額7ドル/ユーザー | ⭐ 4.2 |
| 不和 | Communities | 月額0ドル | ⭐ 4.4 |
| ゼンザップ | 少人数チーム | 月額6ドル/ユーザー | ⭐ 4.5 |
| ねじれ | Async work | 月額6ドル/ユーザー | ⭐ 4.3 |
| マターモスト | セルフホスティング | 1ユーザーあたり月額10ドル | ⭐ 4.3 |
おすすめ商品：
- 総合ベスト： Slack — the deepest app directory and the fastest search.
- ベスト予算： Google Chat — free with Workspace, and simple to set up.
- 初心者におすすめ： Zenzap — almost nothing to learn on day one.
- 非同期チームに最適： Twist — threads first, so nobody feels chained to a green dot.
🎯 Slackの代替品
Slackの代替サービスをお探しですか？おすすめのサービスはこちらです。
- 🚀 マイクロソフトチーム: Built into Microsoft 365, so meetings, files, and chat sit beside Word and Excel.
- 💰 Google チャット: Included free with Google Workspace, with Drive and Meet built straight into every conversation.
- 🌟 不和： Free voice channels and a huge community culture, strong for open groups and creator teams.
- ⚡ ゼンザップ： A simple chat app with task tracking built in, aimed at small teams that hate setup.
- 🧠 ねじれ： Thread-first design that removes the always-online pressure, made for remote teams across time zones.
- 🔒 マターモスト： Open-source and self-hostable, so security teams keep every message on their own servers.
全リストについては、こちらをご覧ください。 Slackの代替品 ガイド。
⚔️ Slackとの比較
Slackと各競合他社との比較は以下のとおりです。
- Slack vs Microsoft Teams: Teams wins on bundled value if you already pay for Microsoft 365. Slack wins on app quality and daily speed.
- Slack vs Google Chat: Google Chat costs nothing extra on Workspace. Slack has far more apps and a much better search.
- Slack vs Discord: Discord is free and great for a community. Slack is built for paid work, with admin and compliance controls.
- Slack vs Zenzap: Zenzap is faster to set up. Slack scales further once your team passes twenty people.
- スラック vs ツイスト： Twist is calmer for async teams. Slack is better when you need live huddles and instant answers.
- Slack vs Mattermost: Mattermost wins on data control. Slack wins on polish, apps, and how little training people need.
今すぐSlackを使い始めましょう
あなたはSlackの主要な機能をすべて使いこなせるようになりました。
- ✅ 会議プラットフォーム
- ✅ テクノロジー最適化ツール
- ✅ Slack接続
- ✅ ワークフロービルダー
- ✅ ドキュメント共有
- ✅ 音声およびビデオメッセージング
- ✅ プロジェクトマネージャー
- ✅ データセキュリティとプライバシー
- ✅ Slackbot
次のステップ： どれか一つの機能を選んで、今すぐ試してみてください。
Most people start with the Meeting Platform.
5分もかかりません。
よくある質問
Slackは何に使われていますか？
Slack is used for team messages, file sharing, and calls. Channels organise work by topic, and direct messages handle quick one-off conversations between two people.
上司は私がSlackで何をしているかを見ることができますか？
Workspace owners can request exports on paid plans, including private messages, with approval. Assume anything you post at work can be read by someone.
なぜ人々はメールではなくSlackを使うのか？
Slack keeps conversations searchable and grouped by topic. Replies land in seconds, apps post updates automatically, and new joiners can read past channel history.
Is Slack free to use?
Yes. The free plan covers channels, direct messages, huddles, and ten app connections. Paid plans start at $4.38 per user monthly for full history.
How is Slack different from Microsoft Teams?
Slack has a bigger app directory and faster search. Teams bundles video and Office files, so it suits companies already paying for Microsoft 365.
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