Kamen Rider Amazon (仮面ライダーアマゾン Kamen Raidā Amazon?, Masked Rider Amazon in English) is a Japanese tokusatsu television series. The fourth installment to be produced as part of the Kamen Rider Series, the series aired in Japan from late 1974 to early 1975 on the Mainichi Broadcasting System. It was the shortest Kamen Rider series ever, lasting only 24 episodes, and starred Tōru Okazaki as the title character.

A plane crashes in the Amazon rainforest, leaving young Amazon (Daisuke Yamamoto) stranded without his parents. Soon adopted by an Incan tribe, Amazon becomes a wild child, living off the land. However, Amazon's idyllic existence is cut short when Gorgos, the Ten Faced Demon, massacres his village, slaughtering everyone except himself in search for the powerful "GiGi Armlet", which gives the bearer fantastic power. Elder Bago, last of the Incas, gives the GiGi Armlet to Amazon for safekeeping while using his knowledge of Incan science and magic to perform a mystical "operation" on Daisuke.