an object of the present invention is to reduce the amount of a chemical substance migrated to food while maintaining adhesion of a transparent vapor deposition film in an adhesive for a flexible package , formed of a polyol and an isocyanate . this object is achieved by a laminate adhesive composition containing a polyester polyol or a polyol such as a polyester polyol , a polyisocyanate , and a silane coupling agent , and also preferably a styrene - maleic acid copolymer , in which the silane coupling agent is a mixture of an epoxy silane and an aminosilane or a reaction product thereof .