To provide an organic transistor having high mobility and a large current on/off ratio, and exhibiting excellent storage stability.

The organic transistor having an organic semiconductor layer contains at least one kind of compounds expressed by a general formula 1, wherein X1-X4 indicate a hydrogen atom, a halogen atom, a straight-chain, branched, or annular alkyl group, a straight-chain, branched, or annular alkoxy group, or a substituted or unsubstituted aryl group independently. A ring A indicates a substituted or unsubstituted thienothiophene ring, a substituted or unsubstituted dithienothiophene ring, or a substituted or unsubstituted benzodithiophene ring. A ring B indicates a substituted or unsubstituted benzene ring, a substituted or unsubstituted thiophene ring, a substituted or unsubstituted benzo[b]thiophene ring, or a substituted or unsubstituted naphthalene ring.