鼠蛛（英语：Mouse spiders，学名：Missulena）是蜘蛛目的一个属，属于猛蛛亚目 Actinopodidae。目前已知有11种品种，大部份都生长于澳洲，只有一种名叫 M. tussulena的蜘蛛，被发现于智利。以往这种蜘蛛一直被认为是像老鼠一样生活于洞穴之中，故名，但后来发现并非如此。

Missulena is a genus of spiders in the mygalomorph family Actinopodidae, sometimes called mouse spiders. There are about 17 known species in this genus, all but one of which are indigenous to Australia. One species, M. tussulena, is found in Chile. The name derives from an old belief, now known to be false, that the spiders dig deep burrows similar to those of mice.