|This article is about a/an villain organization in Kamen Rider, the original series.|
|Led by:||Great Leader of Gel-Shocker|
|Generals and other Notable Members:||General Black|
|Monster Types:||Gel-Shocker Kaijin|
|Battled:||Double Riders (#1 and #2)|
|Teamed up with:||Shocker|
Geldam (ゲルダム団 Gerudamu) is an evil organization which joined forces with Shocker and its Great Leader after the latter's defeat by the Double Riders. They merged to form Gel-Shocker. A notable member of Geldam was General Black, a Gel-Shocker executive stationed in Africa with the ability to become Hiruchameleon, he made the alliance with the Great Leader.
- Main article: General Black
General Black/Hiruchameleon (80-98) - Gel-Shocker's eminent chief from Africa. His monster form is Hiruchameleon, a leech/chameleon monster. Destroyed by Kamen Rider 1 and Kamen Rider 2's Rider Double Chop. Eventually, General Black was resurrected and worked for Destron in an important operation, but ended up dying in the self-destruction of a Destron base.
- Main article: Ganikomol
Ganikomol (78-80 & 97) - A crab/bat monster. Its flight capable and its power and reflexes seemingly surpassed Kamen Rider 1. He also has ability to spit smoke which can cause it's target become dust and it smoke also used at Tobei Tachibana body which actually it's General Black disguised as him. Ganikomol was the only Geldam monster that actually appears in the series. He faces Kamen Rider 1 several times as a mysterious opponent, denying to be a Shocker monster. However, after Shocker is destroyed and Gel-Shocker arises, Ganikomol kills the remaining of Shocker Combatmen who try to escape before faces Rider 1 once again. In a desperation move, Kamen Rider 1 goes against its flight attack in mid air, and the impact creates an explosion which seemingly engulfs both.