库胡林（英语：Cuhullin；爱尔兰语：Cú Chulainn）凯尔特神话中半人半神的英雄。

为太阳神鲁格（Lugh）跟阿尔斯特公主黛克泰尔(Deichtire)所生的儿子，乳名是瑟坦特（Sétanta）。

传说中库胡林在战场乘的双轮战车是由灰色的玛哈（Macha）和黑色的桑格兰（Sainglain）两匹马拉着。他活耀在爱尔兰的阿尔斯特（Ulster）中，一个由康纳尔‧马克‧内萨（Conchobar mac Nessa）王统治的国家。

The Gáe Bulg (also Gáe Bulga, Gáe Bolg, Gáe Bolga), meaning "spear of mortal pain/death spear", "gapped/notched spear", or "belly spear", was the name of the spear of Cúchulainn in the Ulster Cycle of Irish mythology. It was given to him by his martial arts teacher, the warrior woman Scáthach, and its technique was taught only to him.