A hinge mechanism, which connects a first member and a second member, comprising: a plurality of bases, a plurality of shafts, which are provided at the plurality of bases one by one, and protrude from the bases, a plurality of shaft receiving units, which are provided in the second member, and include shaft holes into which the shafts are rotatably fitted, respectively, and a regulating stopper, wherein when a force is applied at the regulating stopper, the regulating stopper is bent from a position where the regulating stopper contacts with a regulated unit to a position where the regulating stopper does not contact with the regulated unit.