An angle-adjustable engine starter structure for remote-control toy car is disclosed to include an engine, a driven gear coupled to an one-way axle bearing at the output shaft of the engine, a drive gear meshed with the driven gear and rotatable by an electric starter, a side cover covering the drive gear and the driven gear and having outside radial teeth, and an outer cover detachably fastened to the engine with screws and having radial teeth meshed with the radial teeth of the side cover to hold the side cover and the drive gear in position and for allowing adjustment of the angular position of the side cover and the drive gear relative to the driven gear after disconnection of the outer cover from the engine.