To provide a component mounting structure in a simple construction, capable of adjusting the misalignment of the inserting position for a mounting bolt to be inserted from the component side with respect to the position of a female threaded hole provided in a component mounting part, and performing a component mounting operation in a short time certainly.

Each component 6 is provided with a circular washer fit-in hole 8 having a larger diameter than the shaft diameter of the male threaded part 5a of the mounting bolt 5. The washer 1 is provided with a small diameter disk fit-in part 2 to be fitted in the washer fit-in hole, a long hole 3 for the insertion of a fastening shaft stretching in the radial direction including the center of the small diameter fit-in part 2, and a large diameter abutting part 4 protruding in the radial direction from the periphery at axial one end of the small diameter fit-in part 2 and abutting on the component outer surface at the periphery of the washer fit-in hole.