To provide a mounting structure for a floor hinge, allowing a work for mounting the floor hinge to be easily performed.

In a mounting structure for a floor hinge, the mounting structure having a case 11 which is mounted to a skeleton A of a building, anchor members 40 each having a male screw 41 are provided in the skeleton A. A base plate 20 is attached to the anchor members 40 by respective pairs of upper nut 42 and lower nut 43 each screwed onto the male screw 41 of the anchor member 40. The case 11 of the floor hinge 10 is mounted on the base plate 20. The base plate 20 is mounted to the anchor members 40 by the male screws of the anchor members 40 and the nuts 42, 43, thereby allowing welding work at a construction site to be eliminated.