An electronic component package includes a core member including an insulating layer, and having a first through-hole passing through the insulating layer, a semiconductor chip disposed in the first through-hole, and having an active surface on which a connection pad is disposed, and an inactive surface opposing the active surface, an encapsulant encapsulating the core member and the semiconductor chip, and filling at least a portion of the first through-hole, a connection member disposed on the core member and the semiconductor chip, and including a redistribution layer electrically connected to the connection pad, a backside metal layer disposed on the encapsulant, and covering at least the inactive surface of the semiconductor chip, and a backside metal via passing through the encapsulant, and connecting the backside metal layer to one side of the insulating layer. The backside metal via is in contact with the one side of the insulating layer.