车轮虫属(英语：Trichodina)是纤毛虫类原生生物车轮虫科下的一属，常寄生或偏利共生于水生生物，特别是鱼类。

Trichodina is a genus of ciliate protists that is ectocommensal or parasitic on aquatic animals, particularly fish. They are characterised by the presence of a ring of interlocking cytoskeletal denitcles, which provide support for the cell and allow for adhesion to surfaces including fish tissue.