仕組みと動作原理
CONCAT関数はExcel業務を効率化する代表的な関数です。区切り記号なしで、複数の範囲やセルに含まれる文字列を1つに結合します。 複雑な集計や参照処理を簡素化し、データ分析の精度と生産性を飛躍的に高めます。
💡 わかりやすい要約
Glues multiple pieces of text from different cells together into a single cell, without any spacing in between.
"Think of this like gluing Lego blocks together. You take two separate blocks (Username and Domain) and snap them into one long block."
構文.
標準Excel表記法=CONCAT(テキスト1, [テキスト2], ...)引数一覧.
この関数で指定できるすべての引数について詳しく解説します。
The first text item or cell range to combine.
指定例:A2Additional strings, delimiters, or ranges (up to 253 arguments).
指定例:"@"Optional third range or string.
指定例:B2具体的な計算例
ステップ別の実務シナリオConstruct Email Addresses
Combine Username in column A with "@" and Domain in column B.
| Username | Domain | Constructed Email | ||
|---|---|---|---|---|
| johndoe | company.com | — | — | — |
| sarahc | gmail.com | — | — | — |
| mjordan | nba.com | — | — | — |
=CONCAT(A2, "@", B2)Evaluates CONCAT over the sample table cells, placing the verified output in cell C2:C6.
数式ジェネレーター
ウィザードを開く引数を入力するだけで、シートにそのまま貼り付けて使える数式を作成できます。
=CONCAT()出力される値の特性
Returns "Calculated output" based on sample evaluation criteria and active cell references.
実務上のベストプラクティス
- To insert a space or custom character between combined cells, include it as a separate argument in quotes (e.g. `=" "` or `"-"`).
- Use the ampersand `&` operator as a quick shortcut for CONCAT (e.g. `=A2 & "@" & B2`).
よくあるミスと注意点
- CONCAT does not skip blank cells. If you select a range containing empty cells, they will be output as empty sections in the resulting text.
各プラットフォーム対応表
実際のExcelおよびGoogleスプレッドシートの計算エンジン仕様に基づいた検証結果です。
In Excel 2016 or older, use CONCATENATE or the ampersand (&) operator.
Introduced in Excel 2019 and Excel 365 as the modern successor to CONCATENATE.
100% compatible with Google Sheets.
よくある質問と回答
技術解説Can I use CONCAT across different worksheets in Excel?↓
Yes. You can reference cells located on other sheets by including the sheet name followed by an exclamation mark, for example: =CONCAT(Sheet2!A2:A10). If the sheet name contains spaces, enclose it in single quotes: ='Q1 Report'!A2:A10.
What is the most common reason for errors in CONCAT?↓
CONCAT does not skip blank cells. If you select a range containing empty cells, they will be output as empty sections in the resulting text.
Does CONCAT work identically in Google Sheets?↓
Yes, CONCAT is supported in both Microsoft Excel and Google Sheets with standard evaluation behavior.