NOVELTY - An organic photoelectric conversion element (10) comprises cathode (12), anode (11), photoelectric conversion layer (14) disposed between cathode and anode, and intermediate layers other than photoelectric conversion layer. A photoelectric conversion layer comprises p-type organic semiconductor material and n-type organic semiconductor material. At least one of intermediate layer contains high molecular compound having side chain (I).    USE - Organic photoelectric conversion element is used for solar cell (claimed).    ADVANTAGE - The organic photoelectric conversion element has high photoelectric conversion efficiency, and excellent durability.    DETAILED DESCRIPTION - An organic photoelectric conversion element comprises cathode, anode, photoelectric conversion layer disposed between cathode and anode, and intermediate layers other than photoelectric conversion layer. A photoelectric conversion layer comprises p-type organic semiconductor material and n-type organic semiconductor material. At least one of intermediate layer contains high molecular compound having side chain of formula: -L1-N(-L2)(-L3) (I).    L1=1-20C alkylene, 3-20C cycloalkylene, 2-20C alkynylene, 6-30C arylene, 1-30C heteroarylene, or 1-20C alkyleneoxy (all optionally substituted), or bivalent coupling group of -(L'1)-(OR)p- (i);    L'1=1-20C alkylene, or 6-30C arylene (all optionally substituted), or single bond;    R=ethylene, trimethylene, or propylene;    p=1-5;    L2=group of formula:-L1-N(-L4)2 (ii);and    L3,L4=H, or optionally substituted 1-20C alkyl.    INDEPENDENT CLAIMS are included for the following:    (1) solar cell, which consists of organic photoelectric conversion element; and    (2) high molecular compound.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional schematic view of organic photoelectric conversion element.    Photoelectric conversion element (10)    Anode (11)    Cathode (12)    Photoelectric conversion layer (14)    Positive hole transport layer (26)    Electron-carrying layer (27)