By providing a heretofore unknown laminate adhesive, the present invention addresses the problem of providing an adhesive composition for laminate stacks, which provides excellent adhesion between a metal layer and a plastic layer and satisfies moisture resistance, heat resistance, insulation performance, durability, etc., further combined with electrolyte resistance in low-temperature curing, without causing delamination over time. The present invention also addresses the problem of providing a stack using the adhesive composition, and a secondary battery. The above problems are solved with a laminate adhesive containing a non-chlorine polyolefin resin (A), an epoxy compound (B), and an organic solvent (C) essentially containing a cyclic alkane compound and containing an ester solvent or an alcohol solvent, wherein the organic solvent (C) is constituted such that the ratio of the mass parts of the cyclic alkane compound to the mass parts of other solvents is in the range of 1/1 to 20/1, inclusive.