diff --git a/README.md b/README.md
index e0d53f3..2a996e6 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # quisp-textbook
 
+![cover](cover.jpg "Cover")
+
 ## instruction to edit quisp-textbook
 
 1. write contents in a new file (e.g. `chapter1.md`)
diff --git a/cover.jpg b/cover.jpg
new file mode 100644
index 0000000..a8c005e
Binary files /dev/null and b/cover.jpg differ