NOVELTY - A porous semiconductor fine particles (22) are obtained by coating dispersion liquid containing 1 %mass or less of solid content other than semiconductor fine particles, to total amount, on electroconductive support (1), and heating. The porous semiconductor fine particles are sensitized with dye (I) (21) to obtain photoelectric conversion element (10). The photoelectric conversion element has a laminated structure having photoreceptor (2) having semiconductor fine particle layer in which dye is adsorbed, on support, charge transfer component (3) and counter electrode (4).    USE - Manufacture of photoelectric conversion element for photoelectrochemical cell (both 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 porous semiconductor fine particles are obtained by coating dispersion liquid containing 1 %mass or less of solid content other than semiconductor fine particles, with respect to total dispersion liquid, on an electroconductive support, and heating. The porous semiconductor fine particles are sensitized with dye of formula: M(LL1)m1(LL2)m2(X)m3.CI (I), to obtain photoelectric conversion element. The photoelectric conversion element has a laminated structure having photoreceptor having semiconductor fine particle layer in which dye is adsorbed, on electroconductive support, a charge transfer component and a counter electrode.    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)