diff --git a/Home.md b/Home.md
index 9121fcd..7243f4f 100644
--- a/Home.md
+++ b/Home.md
@@ -77,8 +77,8 @@ if (a === b)
 function
 the_function (
     int     $arg_a,
-    string  $arg_b):
-bool
+    string  $arg_b)
+: bool
 {
   hoge ();
 }
@@ -94,4 +94,16 @@ theFunction (argA, argB)
 {
   hoge ();
 }
+```
+
+TypeScript の場合は，かならず型を明記し，次のやぅにします：
+```typescript
+function
+theFunction (
+    argA:   number,
+    argB:   string)
+: boolean
+{
+  hoge ();
+}
 ```
\ No newline at end of file