闪兽目（学名：Astrapotheria）是南美洲已灭绝的有蹄动物。牠们连同南方有蹄目、滑距骨目及焦兽目同属南蹄目，而南蹄目则属于劳亚兽总目。

闪兽目其下有轮齿兽，其外观像乳齿象，但只有约3米长。

Astrapotheria is an extinct order of South American and Antarctic hoofed mammals that existed from the Late Paleocene (Itaboraian SALMA) to the Middle Miocene (Laventan SALMA), 59 to 12 million years ago. Astrapotheres were large and rhinoceros-like animals and certainly is one of the most bizarre orders of mammals with an enigmatic evolutionary history.