The main object of the invention is to provide an organic semiconductor material whose material designing is easy, and is capable to secure satisfying purity, so that it can be easily used industrially. And further, also to provide an organic semiconductor structure and an organic semiconductor device using the organic semiconductor material.To achieve the object, the present invention provides an organic semiconductor material having a structural formula of the following chemical formula 1: -((A)-(B)).sub.n- 1wherein A is a mesogen exhibiting liquid crystallinity; has a skeletal structure comprising a .pi.-electron ring selected from a group consisting of L-unit of 6.pi.-electron system ring, M-unit of 8.pi.-electron system ring, N-unit of 10.pi.-electron system ring, O-unit of 12.pi.-electron system ring, P-unit of 14.pi.-electron system ring, Q-unit of 16.pi.-electron system ring, R-unit of 18.pi.-electron system ring, S-unit of 20 .pi.-electron system ring, T-unit of 22.pi.-electron system ring, U-unit of 24.pi.-electron system ring and V-unit of 26.pi.-electron system ring (whereupon L, M, N, O, P, Q, R, S, T, U and V each represent an integer of 0 to 12, and L+M+N+O+P+Q+R+S+T+U+V is 1 to 12); B has a chain structure with high flexibility; and n is about 3 to about 3000.