Abstract: The present adhesive for corrugated cardboard for preventing package stack crumbling is characterized by comprising a mixture of a petroleum resin emulsion containing a mineral oil and a water-soluble resin solution. Examples of the water-soluble resin include polyvinyl alcohol, sodium polyacrylate, carboxymethyl cellulose, hydroxyethyl cellulose, etc. The adhesive for corrugated cardboard is effecting for preventing package stack crumbling within a short period of drying time, and does not damage the surfaces of the corrugated cardboard when unpacking the package stack.