Kao ga Mehda (カオ・ガ・メーダ,Kao ga Mēda?) is a giant hammer robot enemy from Mega Man 8 that is native to Sword Man's stage. It is in the background, thus it is invincible. Kao ga Mehda attacks by slamming a pillar into the lava. It mainly appears in the lava flow section of Sword Man's stage, but a Kao ga Mehda that pursuits Mega Man appears in the battle against Gearna Eye.
Its name is derived from the Japanese phrase "kao ga me da", which means "its face is an eye".