A contact device comprising a contact housing, a base and a locking device. The base delimits a base interior. The contact housing engages with the base interior. The locking device comprises a locking structure and a locking pin at an outer housing circumferential side of the contact housing. The locking structure comprises a face spline and an unlocking section adjoining the face spline in an axial direction, the unlocking section extending around the contact housing in sections in the circumferential direction in the shape of a groove, the locking pin connected to the base and protrudes into the base interior. The contact housing may be slid between a first axial position and a second axial position in an axial direction relative to the base. In the first axial position the locking pin engages with the face spline. In the second axial position the locking pin engages with the unlocking section.