A bolt press fit apparatus comprising; a bolt press fit press machine, a hardware mounting members which can move between a press position of the bolt press fit press machine and a retracted position separated from this press position, and which has a predetermined number of bolt-insertion holes into which bolts are press fitted, bolt transfer mechanisms, and bolt temporarily-press fit mechanisms which insert and temporarily press fit the bolts from the bolt transfer mechanism in a corresponding manner with respect to the predetermined number of bolt-insertion holes.