NOVELTY - A metal complex pigment (I) is new.    USE - New metal complex pigment is used for metal complex coloring composition, and used as sensitizing dye for photoelectric conversion element for photoelectrochemical cell (all claimed) e.g. solar cell, photosensor and copier.    ADVANTAGE - The photoelectric conversion element using metal complex pigment has high conversion efficiency and durability.    DETAILED DESCRIPTION - A metal complex pigment of formula: M1(LL1)m1(LL2)m2(CN)m3(X1)m4.CI1 (I) is new.    M1=metal atom;    LL1=bidentate ligand of formula (i);    LL2=bidentate ligand of formula (ii);    m1,m2=1;    m3=1 or 2;    m4=0 or 1;    X1=ligand(s) chosen from isothiocyanate, isocyanate, isoselenocyanate, water, halo and dimethylformamide;    CI1=counter-ion for neutralizing electric charge;    R1,R2=alkyl, amino or heterocyclyl;    L1-L4=single bond, ethenylene, ethynylene, arylene or heteroarylene;    n1=0 or 1;    R3-R6=substituent;    b1-b4=0-3;    A1,A2=acidic group or its salts;and    n2,n3=0-3.    (i) When b1 is 1 or more, then R3 optionally forms ring by coupling with L1; (ii) When b2 is 1 or more, then R4 optionally forms ring by coupling with L2; (iii) When both b1 and b2 are 1 or more, then R3 and R4 optionally couple to form ring; (iv) When b3 is 1 or more, then R5 optionally forms ring by coupling with L3; (v) When b4 is 1 or more, then R6 optionally substituted forms ring by coupling with L4; (vi) When b3 is 2 or more, then R5 does not form ring; and (vii) When both b3 and b4 are 1 or more, then R5 and R6 optionally forms ring. An INDEPENDENT CLAIM is included for metal complex coloring composition, which comprises metal complex pigment (I), and metal complex pigment of formula: M2(LL3)m21(LL4)m22(X2)m23.CI2.    M2=M1;    LL3=LL1;    LL4=LL2;    X2=X1;    CI2=CI1;    m21,m22=1;and    m23=1 or 2.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of photoelectric conversion element.    Electroconductive support (1)    Photoreceptor layer (2)    Charge-transfer component layer (3)    Photoelectric conversion element (10)    Sensitizing dye (21)