diff --git a/docs/docs/contributing.md b/docs/docs/contributing.md
deleted file mode 100644
index f980371..0000000
--- a/docs/docs/contributing.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# Contribution Guide
-
-Regarding how to contribute to this package, please refer to [CONTRIBUTING.md](https://github.com/CyberAgentAILab/python-dte-adjustment/blob/main/CONTRIBUTING.md) for more details.
diff --git a/docs/mkdocs.yml b/docs/mkdocs.yml
index 93c0a7a..c39a197 100644
--- a/docs/mkdocs.yml
+++ b/docs/mkdocs.yml
@@ -52,7 +52,6 @@ nav:
       - Covariate Adaptive Randomization: api/stratified.md
       - Local Distribution: api/local.md
       - Plotting: api/plot.md
-  - Contributing: contributing.md
 
 plugins:
   - search