diff --git a/defer.go b/defer.go
deleted file mode 100755
index 6d20e13..0000000
--- a/defer.go
+++ /dev/null
@@ -1,21 +0,0 @@
-package main
-
-import "fmt"
-
-
-func hoge() {
-	defer fmt.Println("3") // 4th
-	defer fmt.Println("4") // 3rd
-	fmt.Println("5") // 2nd
-}
-
-func fuga() {
-	defer fmt.Println("1") // 5th
-	fmt.Println("2") // 1st
-	hoge()
-}
-
-func main() {
-	fuga()
-}
-
diff --git a/func/defer.go b/func/defer.go
new file mode 100755
index 0000000..6d20e13
--- /dev/null
+++ b/func/defer.go
@@ -0,0 +1,21 @@
+package main
+
+import "fmt"
+
+
+func hoge() {
+	defer fmt.Println("3") // 4th
+	defer fmt.Println("4") // 3rd
+	fmt.Println("5") // 2nd
+}
+
+func fuga() {
+	defer fmt.Println("1") // 5th
+	fmt.Println("2") // 1st
+	hoge()
+}
+
+func main() {
+	fuga()
+}
+
diff --git a/func/loop.go b/func/loop.go
new file mode 100644
index 0000000..8788158
--- /dev/null
+++ b/func/loop.go
@@ -0,0 +1,45 @@
+package main
+
+import "fmt"
+
+// NG Sample
+func hoge() {
+	for i := 0; i < 5; i++ {
+		f := func() {
+			fmt.Println(i)
+		}
+		defer f()
+	}
+}
+
+// OK Sample
+func fuga() {
+	for i := 0; i < 5; i++ {
+		i := i // important
+		f := func() {
+			fmt.Println(i)
+		}
+		defer f()
+	}
+}
+
+func main() {
+	hoge()
+	/*
+	   5
+	   5
+	   5
+	   5
+	   5
+	*/
+	fmt.Println()
+	fuga()
+	/*
+	   4
+	   3
+	   2
+	   1
+	   0
+	*/
+}
+