Abstract: In a sunshade device for the rear door window of an automobile both ends of a sunshade screen rod, to which an end of the sunshade screen wound on the winding roll biased by an elastic member in a frame is fastened, are raised and lowered by a telescopic bar and an actuation arm, which are extended or retracted and erected or tilted through a single driving mechanism assembly including a driving motor, so as to spread or wind the sunshade screen.