A device for fitting a toilet seat and a toilet lid to a toilet pan comprises a receiving member (1) provided with abutments (5) projecting rearwardly and having a downwardly inclined upper surface (5a), a main body (7) projecting rearwardly from a hinge (8) and for tightly engaging the receiving member (1), the hinge (8) being swingable with the swinging motion of the toilet seat and/or toilet lid. A hook (9) is pivoted at the rear end of the main body (7) and is biased downwards by a spring (12), and has tripping elements (9e) for releable engagement with the abutments (5) of the receiving member (1) under the bias of the spring (12).