A conductive composition for coating a current collector for a battery or an electrical double layer capacitor, the conductive composition being selected from the group consisting of a conductive composition comprising a vinylsilane copolymer, a polycarboxylic acid (excluding the vinylsilane copolymer), and a conductive auxiliary, the vinylsilane copolymer being represented by the following formula: wherein U represents a unit represented by the following formula: wherein X represents a single bond or a bonding chain, each of R 2 to R 4 independently represents a group selected from the group consisting of: - OR 5 (wherein R 5 represents a group selected from the group consisting of H, a C 1 -C 6 alkyl group, and a group derived from a cation capable of constituting an electrolyte for a battery or electrical double layer capacitor); a C 1 -C 6 alkyl group; and a halogen group, and each of R 21 to R 23 independently represents H or a C 1 -C 6 alkyl group, V represents a unit derived from a vinyl monomer having at least an active hydrogen group (excluding the U), m represents a number of from 1 to 10,000, and n represents a number of from 20 to 100,000, wherein the ratio of m to n (m/n) is 0.0001 to 1, characterized in that X representing oxygen as a bonding chain is excluded; and a conductive composition comprising a vinyl carboxylate copolymer, a polycarboxylic acid (excluding the vinyl carboxylate copolymer), and a conductive auxiliary, the vinyl carboxylate copolymer being a copolymer comprising a vinyl carboxylate monomer and a vinylsilane monomer, characterized in that the vinylsilane monomer is at least one compound selected from the group consisting of a vinylalkyldialkoxysilane, a γ-(meth)acryloxypropyltrialkoxysilane, a γ-(meth)acryloxypropylalkyldialkoxysilane, and vinyltris(β-methoxyethoxy)silane. a conductive composition comprising a vinylsilane copolymer, a polycarboxylic acid (excluding the vinylsilane copolymer), and a conductive auxiliary, the vinylsilane copolymer being represented by the following formula: wherein U represents a unit represented by the following formula: wherein X represents a single bond or a bonding chain, each of R 2 to R 4 independently represents a group selected from the group consisting of: - OR 5 (wherein R 5 represents a group selected from the group consisting of H, a C 1 -C 6 alkyl group, and a group derived from a cation capable of constituting an electrolyte for a battery or electrical double layer capacitor); a C 1 -C 6 alkyl group; and a halogen group, and each of R 21 to R 23 independently represents H or a C 1 -C 6 alkyl group, V represents a unit derived from a vinyl monomer having at least an active hydrogen group (excluding the U), m represents a number of from 1 to 10,000, and n represents a number of from 20 to 100,000, wherein the ratio of m to n (m/n) is 0.0001 to 1, characterized in that X representing oxygen as a bonding chain is excluded; and wherein X represents a single bond or a bonding chain, each of R 2 to R 4 independently represents a group selected from the group consisting of: - OR 5 (wherein R 5 represents a group selected from the group consisting of H, a C 1 -C 6 alkyl group, and a group derived from a cation capable of constituting an electrolyte for a battery or electrical double layer capacitor); - OR 5 (wherein R 5 represents a group selected from the group consisting of H, a C 1 -C 6 alkyl group, and a group derived from a cation capable of constituting an electrolyte for a battery or electrical double layer capacitor); a C 1 -C 6 alkyl group; and a halogen group, and each of R 21 to R 23 independently represents H or a C 1 -C 6 alkyl group, V represents a unit derived from a vinyl monomer having at least an active hydrogen group (excluding the U), m represents a number of from 1 to 10,000, and n represents a number of from 20 to 100,000, wherein the ratio of m to n (m/n) is 0.0001 to 1, characterized in that X representing oxygen as a bonding chain is excluded; and a conductive composition comprising a vinyl carboxylate copolymer, a polycarboxylic acid (excluding the vinyl carboxylate copolymer), and a conductive auxiliary, the vinyl carboxylate copolymer being a copolymer comprising a vinyl carboxylate monomer and a vinylsilane monomer, characterized in that the vinylsilane monomer is at least one compound selected from the group consisting of a vinylalkyldialkoxysilane, a γ-(meth)acryloxypropyltrialkoxysilane, a γ-(meth)acryloxypropylalkyldialkoxysilane, and vinyltris(β-methoxyethoxy)silane.