Godzilla

Raymond Burr

Steve Martin

宝田明

Ogata

平田昭彦

Dr. Serizawa

志村喬

Dr. Yamane

河内桃子

Emiko Yamane

Emilio Cigoli

Steve Martin (voice)

Rita Savagnone

Emiko Yamane (voice)

Giuseppe Rinaldi

Ogata (voice)

Vittorio Cramer

George Lawrence (voice) (as Vittorio Kramer)

Pino Locchi

Security Officer Tomo Iwanaga (voice)

Gianfranco Bellini

Dr. Serizawa (voice) (uncredited)

Bruno Persa

Dr. Yamane (voice) (uncredited)