an organic transistor includes a semiconductor section that includes a thin - film laminate in which a first organic thin film and a second organic thin film are alternately stacked . the thin - film laminate includes at least two layers of the first organic thin film . the first organic thin film is a pentacene thin film , and the second organic thin film is an amorphous organic thin film . the pentacene thin film may be a pentacene bilayer thin film , and the amorphous organic thin film may be a tetraaryldiamine thin film . the tetraaryldiamine thin film may be an α - npd thin film . the organic transistor has improved transistor characteristics .