An electrode includes: a collector; and an active material layer provided on the collector, containing a copolymer obtained by copolymerizing, as a comonomer, at least one member selected from monomers represented by the following general formulae (1) to (4) with vinylidene fluoride or vinylidene fluoride and a copolymerizable monomer thereof wherein each of R1 to R3 independently represents a hydrocarbon group having from 4 to 10 carbon atoms; R4 represents a hydrogen atom or a methyl group; each of R6 and R7 independently represents a hydrogen atom or a hydrocarbon group having from 1 to 4 carbon atoms; each of R5 and R8 independently represents a hydrogen atom or a hydrocarbon group having from 4 to 10 carbon atoms; and X represents a cyano group or an aldehyde group.