A semiconductor package includes an interposer, a die, a protective layer, a plurality of first electrical connectors and a first molding material. The die includes a first surface and a second surface opposite to the first surface, and the die is bonded to the interposer through the first surface. The protective layer is disposed on the second surface of the die. The first electrical connectors are disposed aside the die. The first molding material is disposed aside the die, the protection layer and the first electrical connectors.