PURPOSE: To provide the moist-hardening type hot-melt adhesive composition possible of melting at relatively low temperatures, having a low viscosity in a molten state and good in coating workability, rapidly solidifiable after coated and laminated with resultant good initial adhesive force manifestation, also presenting the final adhesive force and heat-resistant creep characteristics after moist-hardened.

CONSTITUTION: The objective adhesive composition comprises (1) an active NCO group-contg, urethane prepolymer prepared by reaction of a polyisocyanate compound with ≥50wt.% of (A) a crystalline polyester polyol 3000-10000 in number-average molecular weight and (2) another active NCO group-contg. urethane prepolymer prepared by reaction of a polyisocyanate compound with ≥10wt.% of (B) a crystalline polyester polyol 1000-3000 in number-average molecular weight, or comprises a third active NCO group-contg. urethane prepolymer prepared by reaction of a polyisocyanate compound with a mixed polyester polyol composed of ≥50wt.% of the component A and ≥10wt.% of the component B.