Composite member fixing structure

A composite member fixing structure for fixing a composite member made of an integrated resin member and a metal member to a coupled member, the composite member having an insertion hole having an inner circumferential surface, a contacting portion is provided in a region of the insertion hole that is made of the metal member, the coupled member having an internal thread, the composite member fixing structure comprising:

• a bolt insertable into the insertion hole and fastened to the internal thread of the coupled member, wherein the bolt includes a head, a shank extending from the head, a threaded rod that extends from the shank and mated with the internal thread of the coupled member, and a step portion provided at the shank;
• and
• an annular sealing member located between the step portion of the bolt and the head,
• wherein, with the threaded rod of the bolt being mated with the internal thread of the coupled member, the step portion contacts the contacting portion, and the sealing member is located between the bolt and the resin member of the composite member,
• wherein the shank of the bolt has an outer circumferential surface,
• wherein a circumferential groove is provided at and extends along the outer circumferential surface of the shank, the annular sealing member disposed in the circumferential groove, and
• wherein the sealing member is located between the shank of the bolt and the inner circumferential surface of the insertion hole.