A member mounting structure joins together a first member which has a first mounting hole and a second member which has a second mounting hole. The member mounting structure is configured in such a manner that a pin has a shaft section and a radial protrusion section which protrudes in the radial direction from the shaft section. A clip, which is formed by punching and press-forming a metallic plate and which is used to grip the first member, has: a first plate section which has formed therein a first insertion hole into which the shaft section of the pin is inserted; a second plate section which faces the first plate section; and a connection section which connects the first plate section and the second plate section.