diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 9bcb42c..aef4571 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -15,8 +15,17 @@ jobs:
 - job: Build
   pool: 
     vmImage: ubuntu-latest
-  condition: and(succeeded(), startsWith(variables['Build.SourceBranch'], 'refs/tags/stage-'), eq(variables['Build.SourceBranchName'], 'develop'))
   steps:
+    - checkout: self
+    - script: |
+        git fetch origin main:main
+        if git merge-base --is-ancestor $(Build.SourceVersion) main; then
+          echo "This commit is in the main branch."
+        else
+          echo "This commit is not in the main branch."
+          exit 1
+        fi
+      displayName: 'タグが付けられたCommitがdevelopブランチに存在するか確認'
     - script: echo Checked out $(Build.SourceVersion) tagged with $(Build.SourceBranch)
       displayName: "Run a one-line script"