Hymen (Ancient Greek: Ὑμήν), Hymenaios or Hymenaeus, in ancient Greece, was a god of marriage ceremonies, inspiring feasts and song. Related to the god's name, a hymenaios is a genre of Greek lyric poetry sung during the procession of the bride to the groom's house in which the god is addressed, in contrast to the Epithalamium, which was sung at the nuptial threshold. He was one of the winged love gods, Erotes.

He was the son of a muse, Clio or Calliope or Urania or Terpsichore.