NOVELTY - An organic photoelectric conversion element (10) comprises a transparent electrode (12), a photoelectric conversion layer (14) containing conjugated polymer compound having partial structure (I) as p-type organic semiconductor material, and n-type organic semiconductor material, and electrode (13) provided in order on a transparent substrate (11).    USE - Organic photoelectric conversion element is used for solar cell and optical sensor array (all claimed).    ADVANTAGE - The organic photoelectric conversion element has excellent photoelectric conversion efficiency, and durability.    DETAILED DESCRIPTION - An organic photoelectric conversion element comprises a transparent electrode (12), a photoelectric conversion layer containing conjugated polymer compound having partial structure of formula (I) as p-type organic semiconductor material, and n-type organic semiconductor material, and electrode (13) provided in order on a transparent substrate.    R1,R2=H, halo or 1-30C alkyl, 1-30C alkoxy, 2-30C alkylester, 2-30C alkoxy carbonyl, 2-40C alkylamino carbonyl, 2-30C acyl, 2-30C acylamino, 6-30C aryl, or 3-30C heterocyclyl (all optionally substituted);    X1,X2=group of formulae: -S-, -O-, -N(-R3)-, -C(-R4)(-R5)-, or -C(-R6)=C(-R7)-, preferably -S- (i);and    R3-R7=H, halo or 1-30C alkyl, 1-30C alkoxy, 2-30C alkylester, 2-30C allkoxy carbonyl, 2-40C alkylamino carbonyl, 2-30C acyl, amino, 2-30C acylamino, 6-30C aryl, or 3-30C heterocyclyl (all optionally substituted).    When R6 and R7 are aryl, it combines with each other to form ring. An INDEPENDENT CLAIM is included for optical sensor array, which consists of organic photoelectric conversion element arranged in array form.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic sectional view of structure of organic photoelectric conversion element.    Organic photoelectric conversion element (10)    Substrate (11)    Transparent electrode (12)    Electrode (13)    Photoelectric conversion layer (14)