A semiconductor package includes a connection member and a supporting member. The connection member has first and second surfaces opposing each other and a redistribution layer. The supporting member is disposed on the first surface of the connection member, has a first through-hole and a second through-hole spaced apart from each other, and has a blocking layer disposed on at least an inner surface of the second through-hole. A semiconductor chip is disposed in the first through-hole and has connection pads connected to the redistribution layer. At least one passive component is disposed in the second through-hole and has connection terminals connected to the redistribution layer. An encapsulant encapsulates the semiconductor chip and the at least one passive component in the first and second through-holes, respectively. An electromagnetic band-gap (EBG) structure is embedded in the supporting member.