Disclosed is a compound which has a light absorption end wavelength that is a long wavelength. Specifically disclosed is a compound which contains a structural unit represented by formula (1). (In the formula, Z1 represents -O-, -S-, -C(R1)(R2)-, -Si(R3)(R4)-, -N(R5)-, -B(R6)-, -P(R7)-, -P(=O)(R8)-, -Se(R9)(R10)-, -CO-, -SO2- or -C(=C(R11)(R12))- V1 and V2 may be the same or different and each represents -S-, -O-, -Se- or -N(R13)- and n represents an integer of not less than 3. In this connection, the n-number of Z1s may be the same as or different from each other.)