仕組みと動作原理
MID関数はExcel業務を効率化する代表的な関数です。Extracts a specific number of characters from text starting at any position. 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。
構文.
標準Excel表記法=MID(text, start_num, num_chars)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 text string containing the characters you want to extract.
指定例:A2The 1-based character position of the first character to extract.
指定例:5How many characters to return.
指定例:4具体的な計算例
ステップ別の実務シナリオSKU Parsing - Middle Code Extraction
Extract the 4-digit product identifier from SKU "INV-9901-US".
| Raw SKU | Extracted Code |
|---|---|
| INV-9901-US | — |
| INV-4422-EU | — |
=MID(A2, 5, 4)Evaluates MID over the sample table cells, placing the verified output in cell B2.
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。
=MID()出力される値の特性
Returns "9901" based on sample evaluation criteria and active cell references.
実務上のベストプラクティス
- Combine with FIND or SEARCH to extract text between delimiters: =MID(A2, FIND("-", A2)+1, 4).
よくあるミスと注意点
- If start_num is greater than the total length of text, MID returns an empty string ("").
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。
Core standard function supported across all modern and legacy Microsoft Excel versions (365, 2021, 2019, 2016, 2013, 2010), as well as Excel for the Web and Mac.
100% compatible with Google Sheets. Uses identical argument order, data types, and standard calculation logic.
よくある質問と回答
技術解説Can I use MID 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: =MID(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 MID?↓
If start_num is greater than the total length of text, MID returns an empty string ("").
Does MID work identically in Google Sheets?↓
Yes, MID is supported in both Microsoft Excel and Google Sheets with standard evaluation behavior.