diff --git a/vba_code_kukan_detail_master.txt b/vba_code_kukan_detail_master.txt
index 616acf6..80715b2 100644
--- a/vba_code_kukan_detail_master.txt
+++ b/vba_code_kukan_detail_master.txt
@@ -348,15 +348,28 @@ End Sub
 
 ' Button macro (Validate selected row)
 Sub validateDetailDataButton()
-    Dim rowNum As Long
-    rowNum = ActiveCell.Row
+    Dim ws As Worksheet
+    Dim lastRow As Long
+    Dim r As Long
+    Dim errorCount As Long
     
-    If rowNum < 7 Then
-        MsgBox "データ行を選択してください。", vbExclamation
+    Set ws = ActiveSheet
+    lastRow = ws.Cells(ws.Rows.Count, "C").End(xlUp).Row
+    
+    If lastRow < 7 Then
+        MsgBox "データがありません。", vbExclamation
         Exit Sub
     End If
     
-    Call validateDetailData(ActiveSheet, rowNum)
+    errorCount = 0
+    For r = 7 To lastRow
+        Call validateDetailData(ws, r)
+        If Trim(ws.Cells(r, 17).Value) <> "" Then
+            errorCount = errorCount + 1
+        End If
+    Next r
+    
+    MsgBox "検証完了。エラー: " & errorCount & " 件", vbInformation
 End Sub
 
 Sub ExportMasterDetailData()