A semiconductor package includes: a connection structure having first and second surfaces opposing each other and including a redistribution layer; a semiconductor chip disposed on the first surface of the connection structure and having connection pads connected to the redistribution layer; an encapsulant disposed on the first surface of the connection structure and encapsulating the semiconductor chip; a passivation layer disposed on the second surface of the connection structure and having a plurality of first and second openings exposing, respectively, first and second regions of the redistribution layer; and a plurality of underbump metal layers connected to the first region of the redistribution layer through the plurality of first openings, respectively.