A locking mechanism is adapted for locking an object, and includes a housing and a locking member. The housing includes a base wall and a cover extending from the base wall to form a mounting space therebetween, and a mounting port in spatial communication with the mounting space and adapted for permitting the object to be moved into the mounting space therethrough in a mounting direction. The locking member is snapped onto the cover so as to prevent removal of the object from the mounting space through the mounting port in a direction opposite to the mounting direction, in such a manner that a portion of the locking member is disposed in proximity to the mounting port and abuts against one of the sides of the object facing the mounting port.