NOVELTY - An organic semiconductor material contains a polymer compound and a low molecular weight compound. The polymer compound has a skeleton structure in a part of the side or main chain of a pi-electron ring, and the low molecular weight compound has a skeleton structure of a pi-electron ring. The material has a terminal group showing liquid crystallinity at at least1 of both terminals.    USE - Used in the production of an organic transistor, organic electroluminescent element, organic electronic device or organic solar cell (claimed).    ADVANTAGE - The organic semiconductor material can form an organic semiconductor layer showing the mobility of an electric charge which is high and uniform over a broad area.    DETAILED DESCRIPTION - An organic semiconductor material contains a polymer compound and a low molecular weight compound. The polymer compound has a skeleton structure in a part of the side or main chain of a pi-electron ring, and the low molecular weight compound has a skeleton structure of a pi-electron ring. The material has a terminal group showing liquid crystallinity at at least1 of both terminals. The pi-electron ring is selected from L 6pi electron ring, M 8pi electron ring, N 10pi electron ring, O 12pi electron ring, P 14pi electron ring, Q 16pi electron ring, R 18pi electron ring, S 20pi electron ring, T 22pi electron ring, U 24pi electron ring and V 26 pi electron ring.    L-V = integers 0-6;    L+M+N+O+P+Q+R+S+T+U+V = 1-6.    INDEPENDENT CLAIMS are also included for:    (1) an organic semiconductor composition having an organic semiconductor layer comprising this material where the material has a liquid crystal state by quenching from a temperature after retaining at a temperature where a smectic liquid crystal phase is shown;    (2) an organic semiconductor device including a substrate, a gate electrode, a gate insulation layer, an organic semiconductor, a domain electrode and a source electrode; and    (3) the use of the composition as an organic transistor, organic electroluminescent element, organic electronic device or organic solar cell.    DESCRIPTION OF DRAWING(S) - The diagram shows an organic semiconductor device.    Substrate (11)    Gate electrode (12)    Gate insulation layer (13)    Organic semiconductor layer (14)    Domain electrode (15)    Source electrode (16)    Organic semiconductor device (101)