Semiconductor device and method for manufacturing semiconductor device

A semiconductor device according to the present invention is provided with a semiconductor chip in which a plurality of electrode pads is provided on a principal surface, a plurality of bump electrodes provided on the electrode pads of the semiconductor chip, a square-shaped wiring board which is disposed on a side of the principal surface of the semiconductor chip, and in which at least two sides of an outer circumference that face each other are positioned in an area on the principal surface of the semiconductor chip, a plurality of external terminals which is provided on the wiring board, and which are electrically connected to a plurality of the bump electrodes through a wiring of the wiring board, and sealing material which is provided between the semiconductor chip and the wiring board, and which covers a connection part between the bump electrode and the wiring.