According to an embodiment, a semiconductor device includes a first electrically conductive portion, a first semiconductor chip of a reverse-conducting insulated gate bipolar transistor, a second electrically conductive portion, a third electrically conductive portion, a second semiconductor chip of an insulated gate bipolar transistor, and a fourth electrically conductive portion. The first semiconductor chip includes a first electrode and a second electrode. The first electrode is electrically connected to the first electrically conductive portion. The second electrically conductive portion is electrically connected to the second electrode. The third electrically conductive portion is electrically connected to the first electrically conductive portion. The second semiconductor chip includes a third electrode and a fourth electrode. The third electrode is electrically connected to the third electrically conductive portion. The fourth electrically conductive portion is electrically connected to the fourth electrode and the second electrically conductive portion.