diff --git a/interface/interface3.go b/interface/interface3.go
new file mode 100644
index 0000000..70ecea0
--- /dev/null
+++ b/interface/interface3.go
@@ -0,0 +1,40 @@
+package main
+
+import "fmt"
+
+type Piyo struct {
+	Name string
+}
+
+type Hoge interface {
+	Foo()
+}
+
+type Fuga interface {
+	Bar()
+}
+
+type Parent interface {
+	Hoge
+	Fuga
+}
+
+func (p *Piyo) Foo() {
+	fmt.Println("foo")
+	fmt.Println(p)
+}
+
+func (p *Piyo) Bar() {
+	fmt.Println("bar")
+	fmt.Println(p)
+}
+
+func baz(p Parent) {
+	p.Foo()
+	p.Bar()
+}
+
+func main() {
+	v := Piyo{"hoge"}
+	baz(&v)
+}