The fender panel structure includes a fender panel formed of resin, disposed above a vehicle's wheel, and forming an outer plate on the side face of the vehicle. The fencer panel has an outer plate part exposed to the side face of the vehicle, and a reinforcement part disposed in the rear face of an adjacent member next to the outer plate part and extending along an edge of the outer plate part, both of which are integrally formed. The fencer plate has a fitting part, into which the adjacent member fits, formed along the interstice between the edge of the outer plate part, and the reinforcement part.