兀儿肯（拉丁语：Vulcanus）是罗马神话中的火神，维纳斯的丈夫，跛足，相传是被他母亲茱诺打的，亦有是被父亲朱比特打跛的说法。其相对应于希腊神话的赫菲斯托斯，拉丁语中的“火山”一词来源于他。相传火山是他为众神打造武器的铁匠炉。

Vulcan (Latin: Volcānus or Vulcānus; pronounced [wɔlˈkaːnʊs], [wʊlˈkaːnʊs]) is the god of fire including the fire of volcanoes, metalworking, and the forge in ancient Roman religion and myth. Vulcan is often depicted with a blacksmith's hammer. The Vulcanalia was the annual festival held August 23 in his honor. His Greek counterpart is Hephaestus, the god of fire and smithery. In Etruscan religion, he is identified with Sethlans.