NOVELTY - A pendant-type polymer containing aromatic-type repeating unit(s) (I) and nitrogen-containing repeating unit(s) (II), is new. The molar ratio of content of nitrogen-containing repeating unit(s) (II) with respect to total content of aromatic-type repeating unit(s) (I) and nitrogen-containing repeating unit(s) (II) is 1:100-100:100.    USE - New pendant-type polymer is used for color conversion film for color-conversion light-emitting device (both claimed). Uses include but are not limited to organic electroluminescent display, solar cell, liquid crystal display, agricultural film and light emitting diode.    ADVANTAGE - The color-conversion light-emitting device using pendant-type polymer has high color conversion efficiency and luminescent property.    DETAILED DESCRIPTION - A pendant-type polymer containing aromatic-type repeating unit(s) of formula (I) and nitrogen-containing repeating unit(s) of formula (II), is new. The molar ratio of content of nitrogen-containing repeating unit(s) (II) with respect to total content of aromatic-type repeating unit(s) (I) and nitrogen-containing repeating unit(s) (II) is 1:100-100:100.    R1-R5=1-10C alkyl, 6-20C aryl, 7-20C arylalkyl, 2-20C heterocyclyl (all optionally substituted), H, hydroxy, substituted amino, halo, nitro or cyano, in which methylene group of 7-20C arylalkyl and 1-10C alkyl is optionally substituted by group A;    group A=-O-, -S-, -CO-, -COO-, -OCO-, -SO2-, -NH-, -NR'-, -CONH-, -NHCO-, -CONR'-, -NR'CO-, -N=CH- or -CH=CH-;    X=direct bond or coupling group chosen from group of formula (i)-(iii);    p=1-5;    q=1-4;    R'=1-10C alkyl or 6-20C aryl (both optionally substituted);    Y',Z1-Z3=1-20C alkylene, 6-20C cycloalkylene, 6-20C cyclo alkenylene, 6-20C arylene (all optionally substituted), direct bond or group A, in which methylene group of 1-20C alkylene is optionally substituted by group A;    r-t=1-4;and    a,b,d=0 or 1.    INDEPENDENT CLAIMS are included for the following:    (1) color conversion film, which contains pendant-type polymer and low molecular pigment; and    (2) color conversion light-emitting device, which has organic electroluminescent element and color conversion film.