闭鞘姜（学名：Costus speciosus）为姜科闭鞘姜属下的一个种。

Cheilocostus speciosus or (syn. Costus speciosus) or crêpe ginger is possibly the best known cultivated species of the genus Costus. This plant is native to southeast Asia and surrounding regions, from India to China to Queensland, It is especially common on the Greater Sunda Islands in Indonesia. It is also reportedly naturalized in Mauritius, Réunion, Fiji, Hawaii, Costa Rica, Belize, Melanesia, Micronesia, and the West Indies.