Laminating adhesive composition and adhesive.

An adhesive composition comprising a crystalline polymer and a tackifying polymer compatible with said crystalline polymer at a temperature above the melting point of said crystalline polymer, characterized in that said crystalline polymer comprises polyol units formed from a crystalline polyol as units repetition in the molecule, said tackifying polymer has an alkyl group with 4 to 8 carbon atoms and a carboxyl group in the molecule, a content of monomeric units having said alkyl group with 4 to 8 carbon atoms (repeating units it derived from a starting monomer having said alkyl group) is 60 to 99 mol% of the total monomer units of said tackifying polymer, and said alkyl group includes a butyl group;