Knock Knock
- Tahun: 1940
- Negara: United States of America
- Genre: Animation, Comedy
- Studio: Walter Lantz Productions
- Kata kunci: roof, cartoon bear, irritation, cartoon bird, noise, cartoon panda, cartoon woodpecker
- Pengarah: Alex Lovy, Walter Lantz
- Pelakon: Sara Berner, Mel Blanc