A semiconductor chip 109 is mounted on a substrate 100, first wire group 120 and a second wire group 118 having a wire length shorter than the first wire group are provided so as to connect the substrate 100 and the semiconductor chip 109 to each other, and a sealing resin 307 is injected from the first wire group 120 toward the second wire group 118 so as to form a sealer 401 covering the semiconductor chip 109, the first wire group 120, and the second wire group 118.