Provided are an electroconductive composition for coating the current collector of a battery or the like, the composition providing improved adhesion between the current collector and the active material layer of the battery or the like, and providing the battery or the like with improved characteristics. Also provided is a battery or the like obtained using the current collector of the battery or the like in which this composition is used. The electroconductive composition for coating the current collector of a battery or the like contains a vinylsilane-based copolymer, a polycarboxylic acid, and an electroconductive auxiliary agent, the vinylsilane-based copolymer being expressed by formula (1): [Chemical formula 13] (where U is a unit expressed by formula (2) [Chemical formula 14] (where X is a single bond or a non-oxygen bonded chain, and R2-R4 are each independently a unit selected from the group consisting of -OR5 (where R5 is a group selected from the group consisting of H, C1-C6 alkyl groups, and cation-derived groups capable of forming electrolytes for batteries or the like), C1-C6 alkyl groups, and halogen groups), V is a unit derived from a vinyl-based monomer having an active hydrogen group; R21-R23 are each independently an H or a C1-C6 alkyl group, m is a number from 1 to 10,000; n is a number from 20 to 100,000; and the m/n ratio is 0.0001-1).