A conductive polymer composite including a π-conjugated polymer and a dopant polymer contain a repeating unit “a” represented by the following formula (1) and has a weight-average molecular weight with range of 1,000 to 500,000,
wherein R
1
represents a hydrogen atom or methyl group; R
2
represents a single bond, ether group, ester group, or a linear, branched, or cyclic hydrocarbon group having 1-12 carbon atoms and optionally containing an ether group and ester group; R
3
represents a linear or branched alkylene group having 1-4 carbon atoms wherein 1 or 2 hydrogen atoms in R
3
may be substituted with a fluorine atom; Z represents a phenylene group, naphthylene group, or ester group; and “a” is a number satisfying 0