克吕泰涅斯特拉（Clytemnestra）为斯巴达皇后海伦的双胞胎姊妹，在希腊神话中是阿伽门农的妻子，野心勃勃。在丈夫参加特洛伊战争时和情夫埃癸斯托斯一起统治迈锡尼。战争结束后，阿伽门农回国，成为她统治迈锡尼的一大障碍。于是她设计杀死了阿伽门农和他的情妇预言家卡珊德拉。最后她被自己的儿子俄瑞斯忒斯所杀。

Clytemnestra, also spelled Clytaemnestra (pronounced /ˌklaɪtəmˈniːstrə/; Greek:Κλυταιμνήστρα, [klytai̯mnɛ̌ːstra]), in ancient Greek legend, was the wife of Agamemnon, ruler of the Ancient Greek kingdom of Mycenae or Argos. In the Oresteia by Aeschylus, she murdered Agamemnon – said by Euripides to be her second husband – and the Trojan princess Cassandra, whom he had taken as war prize following the sack of Troy; however, in Homer's Odyssey, her role in Agamemnon's death is unclear and her character is significantly more subdued.