A tunnel field effect transistor includes a constant current formation layer, a source region and a drain region provided on the constant current formation layer, a channel layer provided between the source region and the drain region, a gate electrode provided on the channel layer, and a gate insulating film provided between the gate electrode and the channel layer, wherein the source region and the drain region have different conductivity types, and the constant current formation layer forms a constant current between the drain region and the constant current formation layer.