阿特柔斯（Ἀτρεύς）是希腊神话中珀罗普斯和希波达弥亚的儿子，堤厄斯忒斯的哥哥，迈锡尼国王。阿特柔斯家族的故事的特点是复杂而且异常堕落，他与弟弟堤厄斯忒斯的世仇有多种版本。

据传弥耳提洛斯断言，有一个诅咒一直折磨着珀罗普斯的后代。珀罗普斯的儿子阿尔卡托俄斯，阿特柔斯和堤厄斯忒斯杀死了同父异母的兄弟克律西波斯（珀罗普斯与一位女神的儿子）。之后这三人都逃离的家乡比萨。阿特柔斯和堤厄斯忒斯来到了迈锡尼，阿特柔斯成为了迈锡尼国王。但是堤厄斯忒斯不但想夺取阿特柔斯的权力，还勾引其妻子埃洛珀，因此被阿特柔斯驱逐出迈锡尼。堤厄斯忒斯为了报仇，就派普勒斯忒涅斯（阿特柔斯的儿子，由堤厄斯忒斯抚养，有些版本故事中无此人物）去杀阿特柔斯，阿特柔斯没认出他是自己的儿子而杀掉了他。阿特柔斯得知普勒斯忒涅斯的身份后，便假装邀请堤厄斯忒斯回到迈锡尼寻求和解，作为报复，阿特柔斯在宴会上将堤厄斯忒斯的儿子的肉作为食物给他吃。堤厄斯忒斯满怀惊恐的逃到西库昂，希望自己唯一的女儿菲洛庇亚生育更多的儿子为自己报仇。后来阿特柔斯娶了菲洛庇亚，生下了埃癸斯托斯。埃癸斯托斯实际上是堤厄斯忒斯的儿子，但阿特柔斯确以为是自己的。

In Greek mythology, Atreus (/ˈeɪtriəs/; Greek:Ἀτρεύς) was a king of Mycenae in the Peloponnese, the son of Pelops and Hippodamia, and the father of Agamemnon and Menelaus. Collectively, his descendants are known as Atreidai or Atreidae.

Atreus and his twin brother Thyestes were exiled by their father for murdering their half-brother Chrysippus in their desire for the throne of Olympia. They took refuge in Mycenae, where they ascended to the throne in the absence of King Eurystheus, who was fighting the Heracleidae. Eurystheus had meant for their stewardship to be temporary, but it became permanent after his death in battle.