This article is about a/an kaijin in Kamen Rider, the original series.

Gamagirah (ガマギラー Gamagirā, 34, Rider vs Shocker) – A toad monster. His personal emblem was a silhouette of his own head. He was able to release poisonous gas and fought with a chain weapon. He Killed people and destroyed documents connected to Shocker's secrets. He was used to cut through a Cessna airplane which exploded afterwards with Gamagirah inside. Destroyed by Kamen Rider #2's Rider Kick. Gamagirah made a brief return appearance in the monster army of the Kamen Rider vs. Shocker movie, but did not actually have an active participation there.