阿特罗波斯（古希腊语：Ἄτροπος，字面意思是“必然的，不可避免的”）希腊神话中的三位命运女神中的最年幼者。她在罗马神话中的对应者为摩耳塔（Morta，意为“死亡”）。

关于阿特罗波斯的出身，有多种说法。赫西俄德在《神谱》的前半部分说命运三女神是夜神倪克斯的女儿，但在同书的后半部分又说她们是宙斯与忒弥斯所生。柏拉图则认为她们的母亲是阿南刻。

作为命运女神之一，阿特罗波斯的职责是将生命之线剪断（生命之线是由三女神中最年长者克洛托纺织的，而由排行第二的拉刻西斯决定其长度）。她使人类的生命终结，并选择死者的死亡方式。阿特罗波斯是三女神中最矮小也最苗条的一个，她常常被描述成一位拿着大剪刀的老妇人。

Atropos or Aisa (/ˈætrəpɒs/; Ancient Greek: Ἄτροπος "without turn"), in Greek mythology, was one of the three Moirai, goddesses of fate and destiny. Her Roman equivalent was Morta.

Atropos was the oldest of the Three Fates, and was known as the "inflexible" or "inevitable." It was Atropos who chose the mechanism of death and ended the life of mortals by cutting their thread with her "abhorred shears." She worked along with her two sisters, Clotho, who spun the thread, and Lachesis, who measured the length. Atropos has been featured in several stories such as Atalanta and Achilles.