ELECTRICAL DEVICE MOUNTING STRUCTURE

A mounting structure (1) for an electrical device includes a mounting main body (2) that houses an electrical device, and a sliding part (3) that is movable in a sliding direction along a bottom surface (21) of the mounting main body (2) by a guide part provided on the bottom surface (21). The sliding part (3) includes a through hole (39) for insertion of a mounting screw, and a sliding engagement part (34) that engages a projecting position locking part (254) formed in a recessed shape on the bottom surface (21) when the sliding part (3) is disposed at a projecting position at which the through hole (39) is located outwardly of a side surface of the mounting main body (2). In a state in which the sliding part (3) is disposed at the projecting position and the mounting main body (2) is directly mounted on a mounting surface, both sides of the sliding engagement part (34) in a direction perpendicular to the bottom surface (21) are in contact with the projecting position locking part (254) and the mounting surface. This allows the sliding part (3) to be securely fixed to the mounting main body (2).