黑帝斯（古希腊语：ᾍδης），又译为哈迪斯、黑帝斯、哈帝斯、哈德斯、哀地斯、海地士等，是希腊神话中统治冥界的神，相对应于罗马神话的普路托（拉丁语：Plūtō）。他是克罗诺斯和瑞亚的儿子，宙斯的哥哥。他的婚配者是姐姐得墨忒耳的女儿珀耳塞福涅。

希腊神话的死亡观不存在带善恶判断的天堂与地狱，而是认为冥界是所有死者唯一的去处，因此哈得斯的神话形象虽冷酷，但并无大多宗教神话中的恶神色彩，古希腊神话中的黑帝斯形象也是典型的奥林帕斯英挺男子，同时由于神话中的冥府位于地底，黑帝斯同时也被视为地下矿产的支配者。

书库第一书第五章以前都以普鲁托（Πλούτων）称呼冥王，以后便都称为艾多斯（Ἄιδος）或哈得斯（Ἅιδης）。冥王星的拉丁名起源于祂。

Hades (/ˈheɪdiːz/; Ancient Greek: ᾍδης or Άͅδης, Háidēs) was the ancient Greek chthonic god of the underworld, which eventually took his name.

In Greek mythology, Hades was regarded as the oldest son of Cronus and Rhea, although the last son regurgitated by his father. He and his brothers Zeus and Poseidon defeated their father's generation of gods, the Titans, and claimed rulership over the cosmos. Hades received the underworld, Zeus the air, and Poseidon the sea, with the solid earth—long the province of Gaia—available to all three concurrently. Hades was often portrayed with his three-headed guard dog Cerberus and, in later mythological authors, associated with the Helm of Darkness and the bident.