NOVELTY - A nitrogen-containing high-molecular compound has a structure (I), is new.    USE - New nitrogen-containing high-molecular compound is used for composition for laminated structure e.g. electroluminescence element and photoelectric conversion element (all claimed).    ADVANTAGE - The nitrogen-containing high-molecular compound has high solubility with respect to highly polar solvents.    DETAILED DESCRIPTION - A nitrogen-containing high-molecular compound has a structure of formula (I), is new.    Ar1-Ar4=optionally substituted bivalent aromatic group;    or 2 or more Ar1-Ar4=ring;    Ar5=optionally substituted monovalent aromatic group;    p,q,n1,n3,b=0 or more;    R1=monovalent group of formula: -R2((-R5)n1)-(-(R3)n2)-((R4)n3-Y1)n4 (M1)a(Z1)b (II);    R2=optionally substituted aromatic group of valence (1+n1+n4);    R3=optionally substituted divalent organic group;    R4=divalent organic group including a structure which is capable of interacting with chelating cation;    R5=monovalent organic group which can chelate with cation;    or two or more R5=ring;    Y1=monovalent group containing anion chosen from -CO2-, -SO2-, -SO3-, -O-, -PO32- and -BRa3-;    n2=0 or 1;    n4,a=1 or more;    or n1+n3=1 or more;    M1=cation chosen from Li+, Na+, K+,Rb+, Cs+ and (Rb)4N+;    Z1=anion;    Ra,Rb=H or monovalent organic group;    or two or more Ra,2 or more Rb=ring;    R2=optionally substituted benzene ring of valence (1+n1+n4) obtained after removing H from (1+n1+n4) benzene ring;and    X=chloro, bromo, iodo, para-toluene sulfonate group, trifluoromethane sulfonate group, methane sulfonate group, dihydroxy boryl group or dialkoxy boryl group.    INDEPENDENT CLAIMS are included for the following:    (1) composition, which contains material chosen from hole-transport material, electron transport material and luminescent material, and nitrogen-containing high-molecular compound;    (2) laminated structure, which contains composition;    (3) triphenylamine-containing high-molecular compound of formula (IV);    (4) triphenylamine-containing high-molecular compound of formula (V); and    (5) triphenylamine compound of formula (VI).