A fan-out semiconductor package includes: a frame including insulating layers, wiring layers, and connection via layers, and having a recess portion and a stopper layer disposed on a bottom surface of the recess portion; a semiconductor chip having connection pads and disposed in the recess portion so that an inactive surface is disposed on the stopper layer; an encapsulant covering at least portions of the semiconductor chip and filling at least portions of the recess portion; 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 and the connection pads to each other; and a guide pattern disposed adjacent to a wall of the recess portion and disposed in the frame. An edge of the bottom surface of the recess portion has a groove portion.