A fan-out semiconductor package includes: a frame including insulating layers, wiring layers, and connection via layers, and having a recess portion having a stopper layer; a semiconductor chip having connection pads and disposed in the recess portion so that an inactive surface is connected to the stopper layer; an encapsulant covering at least portions of the semiconductor chip and filling at least portions of the recess portion; and a connection member disposed on the frame and an active surface of the semiconductor chip and including a redistribution layer electrically connecting the wiring layers of the frame and the connection pads of the semiconductor chip to each other. A lowermost wiring layer of the wiring layers is embedded in the frame and has a lower surface exposed from a lowermost insulating layer of the frame.