仕組みと動作原理
OR関数はExcel業務を効率化する代表的な関数です。いずれかの引数がTRUEであればTRUEを返し、すべての引数がFALSEの場合にのみFALSEを返します。 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
Checks multiple rules. It outputs TRUE if at least one rule is met; it only outputs FALSE if all rules fail.
"Think of this like qualifying for a free drink. You qualify IF you have a coupon OR it is your birthday. You only need one of them to be true!"
構文.
標準Excel表記法=OR(論理式1, [論理式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 condition to test.
指定例:B2<=18Additional conditions to test.
指定例:C2="Yes"具体的な計算例
ステップ別の実務シナリオDiscount Qualifier
Verify if student age is 18 or under OR student ID status in column C is "Yes".
| Age | Student ID | Status | Qualifies | |
|---|---|---|---|---|
| 21 | Yes | Active | — | — |
| 17 | No | Active | — | — |
| 25 | No | Active | — | — |
=OR(B2<=18, C2="Yes")Evaluates OR over the sample table cells, placing the verified output in cell D2:D6.
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。
=OR()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
- Use OR to check if a cell contains one of several options: e.g. `=OR(A2="Red", A2="Green", A2="Blue")`.
よくあるミスと注意点
- If you supply array ranges to OR, they must be formatted correctly, otherwise it can return #VALUE! or slow down calculation.
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 OR 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: =OR(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 OR?↓
If you supply array ranges to OR, they must be formatted correctly, otherwise it can return #VALUE! or slow down calculation.
Does OR work identically in Google Sheets?↓
Yes, OR is supported in both Microsoft Excel and Google Sheets with standard evaluation behavior.