A carbon material dispersion comprising at least one carbon material selected from the group consisting of carbon black, a carbon fiber, a carbon nanotube, graphite, and graphene; an organic solvent; and a polymeric dispersant, wherein the polymeric dispersant is a polymer having 3 to 55% by mass of a constituent unit represented by the following formula, 45 to 90% by mass of a constituent unit represented by the following formula, and 0.5 to 20% by mass of an additional constituent unit connecting the constituent unit and the constituent unit, provided that the total amount of all the constituent units is assumed to be 100% by mass, and the polymeric dispersant has an amine value of 100 mgKOH/g or less, measured as specified in the description, and a number average molecular weight of 5,000 to 20, 000, as determined by gel permeation chromatography wherein R represents a hydrogen atom or a methyl group, A represents O or NH, B represents an ethylene group or a propylene group, R 1 and R 2 each independently represent a methyl group or an ethyl group, Ar represents a phenyl group, a naphthyl group, an anthracenyl group, or a pyrenyl group, X represents a chlorine atom, a bromine atom, bis(trifluoromethyl)sulfonimide, or bis(nonafluorobutanesulfonyl)imide, and p represents an arbitrary number of repetition; and wherein R represents a hydrogen atom or a methyl group, A represents O or NH, Q represents an ethylene group or a methylethylene group, Y represents O, NHCOO, or NHCONH, m and n each independently represent an average number of repeating units of 0 or more and satisfy m + n = 20 to 100, R 3 represents a C1-18 alkyl group, aryl group, or alkylaryl group, and r represents an arbitrary number of repetition. at least one carbon material selected from the group consisting of carbon black, a carbon fiber, a carbon nanotube, graphite, and graphene; an organic solvent; and a polymeric dispersant, wherein the polymeric dispersant is a polymer having 3 to 55% by mass of a constituent unit represented by the following formula, 45 to 90% by mass of a constituent unit represented by the following formula, and 0.5 to 20% by mass of an additional constituent unit connecting the constituent unit and the constituent unit, provided that the total amount of all the constituent units is assumed to be 100% by mass, and the polymeric dispersant has an amine value of 100 mgKOH/g or less, measured as specified in the description, and a number average molecular weight of 5,000 to 20, 000, as determined by gel permeation chromatography wherein R represents a hydrogen atom or a methyl group, A represents O or NH, B represents an ethylene group or a propylene group, R 1 and R 2 each independently represent a methyl group or an ethyl group, Ar represents a phenyl group, a naphthyl group, an anthracenyl group, or a pyrenyl group, X represents a chlorine atom, a bromine atom, bis(trifluoromethyl)sulfonimide, or bis(nonafluorobutanesulfonyl)imide, and p represents an arbitrary number of repetition; and wherein R represents a hydrogen atom or a methyl group, A represents O or NH, Q represents an ethylene group or a methylethylene group, Y represents O, NHCOO, or NHCONH, m and n each independently represent an average number of repeating units of 0 or more and satisfy m + n = 20 to 100, R 3 represents a C1-18 alkyl group, aryl group, or alkylaryl group, and r represents an arbitrary number of repetition. wherein R represents a hydrogen atom or a methyl group, A represents O or NH, B represents an ethylene group or a propylene group, R 1 and R 2 each independently represent a methyl group or an ethyl group, Ar represents a phenyl group, a naphthyl group, an anthracenyl group, or a pyrenyl group, X represents a chlorine atom, a bromine atom, bis(trifluoromethyl)sulfonimide, or bis(nonafluorobutanesulfonyl)imide, and p represents an arbitrary number of repetition; and wherein R represents a hydrogen atom or a methyl group, A represents O or NH, Q represents an ethylene group or a methylethylene group, Y represents O, NHCOO, or NHCONH, m and n each independently represent an average number of repeating units of 0 or more and satisfy m + n = 20 to 100, R 3 represents a C1-18 alkyl group, aryl group, or alkylaryl group, and r represents an arbitrary number of repetition.