长鼻目（学名：Proboscidea） 是哺乳动物一个目，只包含一个现存生物的科，象科，即大象。包括普通非洲象 (Loxodonta africana)、非洲森林象 (Loxodonta cyclotis)和亚洲象（Elephas maximus）三个物种。

在冰川期有很多现已灭绝的物种， 包括与大象相似的猛犸(长毛象)、乳齿象、恐象、铲齿象、变齿象。 已知的最早的长鼻目动物是Pilgrimella，以及后来的始祖象。

The Proboscidea (from the Greek προβοσκίς and the Latin proboscis) are a taxonomic order of afrotherian mammals containing one living family, Elephantidae, and several extinct families. This order, first described by J. Illiger in 1811, encompasses the trunked mammals. Later proboscideans are distinguished by tusks and long, muscular trunks; these features are less developed or absent in early proboscideans. Proboscidea may have produced the largest land mammal of all time in the form of Palaeoloxodon namadicus, which may have weighed up to 22 t (24 short tons), with a shoulder height of up to 5 metres (16 ft), surpassing several sauropod dinosaurs.