Great Mazinger tai Getter Robot (グレートマジンガー対ゲッターロボ, Gurēto Majingā tai Gettā Robo, Great Mazinger Vs. Getter Robot) is an animated film produced by Toei based in the works of Go Nagai and Ken Ishikawa. The film premiered originally in March 21, 1975 (1975-03-21) in Japan. It is a crossover super robot anime between Great Mazinger and Getter Robot, similar to the one previously done by Toei of Mazinger Z tai Devilman. The events presented in the film are not considered canon to any of two TV anime.
The film was also shown in countries where the two TV series were broadcast. It is known as مازنجر الكبير ضد جيتاروبو in Arabic countries, Grande Mazinga contro Getta Robot G in Italy and Gran Mazinger contra Getter Robo in Spain.