A semiconductor apparatus includes: an insulating substrate including an insulating layer having first and second main surfaces, a metal plate on the first main surface, and first to fourth conductors on the second main surface; a semiconductor device including a rear electrode electrically connected to the first conductor and a front electrode electrically connected to the second conductor; a temperature detection device including a first electrode electrically connected to the third conductor and a second electrode electrically connected to the fourth conductor; a first terminal electrically connected to the third conductor; a second terminal positioned so as to be wire-connectable to the fourth conductor; and a third terminal electrically connected to the second conductor, wherein the fourth conductor is positioned so as to be wire-connectable to the second conductor.