Abstract: A fan module is disposed with a fan mechanism having a fixing portion. The fixing portion has a first surface, a second surface, and a perforation passing through the first and the second surface, wherein the first surface and the second surface face opposite directions. A connector is disposed in the perforation and is electrically connected to a wire set which is adapted to transmit a signal or electric power. A shell of the connector includes a body for passing through the perforation and a protruding portion protruding away from a circumference of the body and abutting against the first surface of the fixing portion. The restricting member is detachably engaged with the fixing portion and the connector to clamp the protruding portion and the fixing portion by two restricting plates of the restricting member. With such design, the fan module could be installed to a site via the connector to achieve positioning and electrical connection once.