鞘尾蝠科，哺乳纲、翼手目的一科，鞘尾蝠科辖下有小兜翼蝠属（小兜翼蝠）、粗毛蝠属等之数种哺乳动物。

The 51 species of sac-winged or sheath-tailed bats constitute the family Emballonuridae, and can be found in tropical and subtropical regions all over the world. Emballonurids include some of the smallest of all bats, and range from 3.5 to 10 cm in body length. They are generally brown or grey, although the ghost bats (genus Diclidurus) are white.