NOVELTY - Photoelectric conversion element (I) comprises: an electrically conductive support having an oxide semiconductor electrode comprising an oxide semiconductor, which is adsorbed with a dye compound (II); and a counter electrode facing the oxide semiconductor electrode through a charge transfer layer.    USE - (I) is useful in solar cell (claimed) for a residential application such as single crystalline silicon, polycrystalline silicon, amorphous silicon, cadmium telluride and indium-copper selenide.    ADVANTAGE - (I) exhibits excellent photoelectric conversion efficiency and durability.    DETAILED DESCRIPTION - Photoelectric conversion element (I) comprises: an electrically conductive support having an oxide semiconductor electrode comprising an oxide semiconductor, which is adsorbed with a dye of cyano-acrylic acid compound of formula (II); and a counter electrode facing the oxide semiconductor electrode through a charge transfer layer.    R1 = alkyl, aralkyl, alkenyl, aryl or aromatic heterocyclic group;    R2 = divalent group containing an aromatic hydrocarbon ring, a divalent group containing an aromatic heterocycle or a divalent group containing an aromatic hydrocarbon ring or aromatic heterocycle;    R3 = H, alkyl, aralkyl, alkenyl, aryl or an aromatic heterocyclic group;    R4 = aryl;    R5 = substituent; either    a = 0 or 1; and    b, c = 1 or 2; or    a+b+c = 3;    d = not less than 0;    e = 0-4;    A = a chain structure containing an electron withdrawing group and an acid group or ethylene group of formula (III);    B1 = group of atoms to form a single ring (optionally substituted); and    X = group containing an acid group.    Provided that: R2 is pi -conjugated with the acid group; and the single ring is not condensed with another ring or substituted with another ring. INDEPENDENT CLAIMS are included for:    (1) a solar cell comprising (I); and    (2) a method of manufacturing (I) comprising: applying oxide semiconductor particles on the electrically conductive support; calcinating the applied oxide semiconductor particles; adsorbing the dye on the calcinated oxide semiconductor particles to form the oxide semiconductor electrode; providing the charge transfer layer on the oxide semiconductor electrode; and providing the counter electrode on the charge transfer layer.