A hinge mounting structure is provided in which a door can open at a wide angle. In a hinge mounting structure including a hinge (1) having a first piece (3) and a second piece (4) that are coupled together via a shaft (2) in such a manner as to be rotatable relative to each other, the first piece (3) being mounted on a side jamb (6), the second piece (4) being mounted on an end face of a door (5), the side jamb (6) is provided with a protruding portion (8) protruding forward of a wall surface, and at least a part of the door (5) is backward of a front surface line (X), in an open position of the door (5).