A semiconductor package includes a wiring board, an electronic component mounted on the wiring board, and an enclosing frame arranged on an upper surface of the electronic component. The enclosing frame includes a basal portion, which has the form of a closed frame and extends along the upper surface of the electronic component, and an adhesion portion, which is wider than the basal portion and is arranged on the upper surface of the basal portion. A cap is adhered to an upper surface of the adhesion portion. A molding resin contacts a lower surface of the adhesion portion and seals the electronic component and the wiring board that are exposed from the enclosing frame.