NOVELTY - A photoelectric conversion element has a laminated structure having photoreceptor (2) having a semiconductor fine particle layer in which dye (I) (21) is adsorbed, on electroconductive support (1), a charge transfer component (3) and a counter electrode (4). The charge transfer component has an electrolytic composition containing heterocyclic quaternary salt compound.    USE - Photoelectric conversion element is used for photoelectrochemical cell (claimed) e.g. photosensor, copier and solar cell.    ADVANTAGE - The photoelectric conversion element is economically manufactured with high conversion efficiency and excellent durability.    DETAILED DESCRIPTION - A photoelectric conversion element has a laminated structure having photoreceptor having a semiconductor fine particle layer in which dye is adsorbed, on electroconductive support, a charge transfer component and a counter electrode. The charge transfer component has an electrolytic composition containing heterocyclic quaternary salt compound. The dye is of formula: M(LL1)m1(LL2)m2(X)m3.CI (I).    M=metal atom;    LL1=bidentate or tridentate ligand of formula (2);    LL2=bidentate or tridentate ligand of formula (3);    X=monodentate or bidentate ligand coordinated by group chosen from acyloxy, acylthio, thioacyloxy, thioacyl thio, acyl aminooxy, thiocarbamate, dithiocarbamate, thio carbonate, dithio carbonate, trithio carbonate, acyl, thiocyanate, isothiocyanate, cyanate, isocyanate, cyano, alkylthio, arylthio, alkoxy, or aryloxy, or monodentate or bidentate ligand consisting of halo, carbonyl, dialkyl ketone, 1,3-diketone, carbonamide, thio carbonamide, or thiourea;    m1=1-3;    m2,m3=0-2;    CI=counter-ion required to neutralize electric charge;    R1,R2=carboxy, sulfonic acid group, hydroxy, hydroxamic acid group, phosphoryl, or phosphonyl;    R3,R4=substituent;    R5,R6=aryl or heterocyclyl;    L1,L2=conjugated chain consisting of optionally substituted ethenylene and/or ethynylene;    a1,a2,b1,b2=0-3;    R3+R4=ring;    n=0 or 1;    Za,Zb,Zc=nonmetallic atomic group capable of forming 5- or 6-membered ring;and    c=0 or 1.    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of photoelectric conversion element.    Electroconductive support (1)    Photoreceptor (2)    Charge transfer component (3)    Counter electrode (4)    Photoelectric conversion element (10)    Dye (21)    Porous semiconductor fine particles (22)