NOVELTY - A photoelectric conversion element consists of a primary electrode, a secondary electrode, a layer (A) containing high-molecular compound containing heterocyclic group-containing structural unit (a) (I) provided between the primary electrode and the secondary electrode, and a layer (B) containing high-molecular compound containing 9H-fluorene-type structural unit (b) (II) provided between the primary electrode and the layer (A). The secondary electrode is a metal electrode having a film thickness of 40 nm or less.    USE - Photoelectric conversion element is used for solar cell module and sensor (all claimed) for electrophoretic display, liquid crystal display, and organic electroluminescent display.    ADVANTAGE - The photoelectric conversion element has high light transmittance and photoelectric conversion efficiency.    DETAILED DESCRIPTION - A photoelectric conversion element consists of a primary electrode, a secondary electrode, a layer (A) containing high-molecular compound containing heterocyclic group-containing structural unit (a) of formula (I) provided between the primary electrode and the secondary electrode, and a layer (B) containing high-molecular compound containing 9H-fluorene-type structural unit (b) of formula (II) provided between the primary electrode and the layer (A). The secondary electrode is a metal electrode having a film thickness of 40 nm or less.    Z=group chosen from groups of formulae (Z-1)-(Z-7);    Ar1,Ar2=trivalent heteroaryl;    R=H, halo, amino, cyano, or monovalent organic group chosen from groups of formulae (Z-1)-(Z-7);    R1a=group chosen from groups of formulae (R1-1)-(R1-4);    R1b=10C or less monovalent organic group chosen from groups of formulae (R1-1)-(R1-4);    R2=group chosen from groups of formulae (R2-1)-(R2-4);    R1a+R1b=group (R2-2), group (R2-3), or group (R2-4);    R3=H or 10C or less monovalent organic group;    M+=Li+, Na+, K+, Cs+ or NMe4+;    L-=F-, Cl-, Br-, I-, OH-, ClO-, ClO2-, ClO3-, ClO4-, SCN-, CN-, NO3-, SO42-, HSO4-, PO43-, HPO42-, H2PO4-, BF4-, or PF6-;and    n=0-10.