The invention provides a semiconductor package and a method for fabricating the same. The semiconductor package includes a redistribution layer (RDL) structure, a semiconductor die, a molding compound and a supporter. The RDL structure has a first surface and a second surface opposite to the first surface. The semiconductor die is disposed on the first surface of the RDL structure and electrically coupled to the RDL structure. The molding compound is positioned overlying the semiconductor die and the first surface of the RDL structure. The supporter is positioned beside the semiconductor die and in contact with the first surface of the RDL structure.