When Dinosaurs Ruled the Earth
- Tahun: 1970
- Negara: United Kingdom
- Genre: Adventure, Fantasy, Science Fiction
- Studio: Hammer Film Productions
- Kata kunci: tsunami, stop motion, prehistory, prehistoric creature, dinosaur, raft, quicksand, catfight, cavemen, cave girls, pterodactyl, prehistoric man, man eating plant
- Pengarah: Val Guest
- Pelakon: Victoria Vetri, Robin Hawdon, Patrick Allen, Drewe Henley, Sean Caffrey, Magda Konopka