In a vehicle ceiling-mounting electric equipment assembly of the invention, an FPC (12) is welded by heat to a casing (11) of a lamp unit (2), and an FFC (16) for external connection is electrically connected to the FPC (12) by press-clamping or welding. Switches (13) and lamp socket holes (14a) are provided at the FPC (12). An end portion of the FPC (12) is folded to be inserted into a fitting portion (11a) of a recess-shape in which an optional member (26) can be mounted, and a circuit pattern is exposed to a side surface of the fitting portion (11a) to form a connection portion. Therefore, the compact, lightweight design can be achieved, and parts, such as a connector, are unnecessary, thus reducing the number of the component parts.