A tunnel field-effect transistor (TFET) is configured by disposing a III-V compound semiconductor nano wire on a (111) plane of a IV semiconductor substrate exhibiting p-type conductivity, and arbitrarily disposing electrodes of a source, drain and gate. Alternatively, the tunnel field-effect transistor is configured by disposing a III-V compound semiconductor nano wire on a (111) plane of a IV semiconductor substrate exhibiting n-type conductivity, and arbitrarily disposing electrodes of a source, drain and gate. The nano wire is configured from a first region and a second region. For instance, the first region is intermittently doped with a p-type dopant, and the second region is doped with an n-type dopant.