NOVELTY - A photoelectric conversion element (E1) comprises: an electrically conductive thin layer (201); an organic photoelectric conversion layer (200); and a transparent electrically conductive thin layer (204); where the organic photoelectric conversion layer contains a compound (C1) having a partial structure of heterocycle (I) and/or triarylamine (II), and a fullerene or a fullerene derivative.    USE - As a photoelectric conversion element useful for an imaging device (claimed), such as digital camera, video camera, scanner, or copier, or usable as a solar cell, or a photodetector such as a biosensor or chemical sensor.    ADVANTAGE - The photoelectric conversion element exhibits high photoelectric conversion efficiency.    DETAILED DESCRIPTION - A photoelectric conversion element (E1) comprises: an electrically conductive thin layer (201); an organic photoelectric conversion layer (200); and a transparent electrically conductive thin layer (204); where the organic photoelectric conversion layer contains a compound (C1) having a partial structure represented by heterocycle of formula (I) and/or triarylamine of formula (II), and a fullerene or a fullerene derivative.    X=O, S, or NR10;    R10=H or a substituent;    Rx and Ry=H or a substituent;or    Rx+Ry=a ring;    R=bond, H, or a substituent;or    R+R=a ring;    n=1-4;    R'a-R'c=bond or a substituent;or    R'a+R'a, R'b+R'b and R'c+R'c=ring;    p-r=0-5.    Provided that:    (1) at least one of Rx and Ry represents an electron-withdrawing group;    (2) at least one R is a bond;    (3) when p, q and r each is an integer of at least 2, then p+q+r is not 0; and    (4) at least one of R'a-R'c is a bond.    An INDEPENDENT CLAIM is included for an imaging device comprising the photoelectric conversion element (E1).    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view the photoelectric conversion element.    Organic photoelectric conversion layer (200)    Electrically conductive thin layer (201)    Charge-blocking layers (202a, 202b)    Transparent electrically conductive thin layer (204)