There are provided an organic semiconductor structure comprising an organic semiconductor layer, which is large in size and homogeneous and has high charge transfer characteristics, a process for producing the same, and an organic semiconductor device. The organic semiconductor structure has, in at least a part thereof, an organic semiconductor layer comprising an aligned liquid crystalline organic semiconductor material. The liquid crystalline organic semiconductor material comprises an organic compound having a core comprising L 6 .pi. electron rings, M 8 .pi. electron rings, N 10 .pi. electron rings, O 12 .pi. electron rings, P 14 .pi. electron rings, Q 16 .pi. electron rings, R 18 .pi. electron rings, S 20 .pi. electron rings, T 22 .pi. electron rings, U 24 .pi. electron rings, and V 26 .pi. electron rings, wherein L, M, N, O, P, Q, R, S, T, U, and V are each an integer of 0 (zero) to 6 and L+M+N+O+P+Q+R+S+T+U+V=1 to 6. The liquid crystalline organic semiconductor material exhibits at least one liquid crystal state at a temperature below the heat decomposition temperature thereof.