diff --git a/.gitignore b/.gitignore
index 494f81b..452405e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,13 @@
 .cxx
 local.properties
 app/build/
+
+# PowerPoint / Office
+*.pptx
+*.ppt
+~$*.pptx
+
+# 스크린샷 (안드로이드 캡쳐)
+Screenshot_*.jpg
+Screenshot_*.png
+Screenshot_*.jpeg