To obtain a one-part moisture curing type urethane resin composition having a small amount of residual foam in a cured product and scarcely lowering adhesive strength.

This one-part moisture curing type urethane resin composition comprises 100 pts.vol. of a urethane prepolymer having isocyanate groups at both terminals and 500-2,000 pts.vol of a filler having 20-500 μm average particle diameter. A pumicious sand balloon, a glass balloon, a ceramic balloon ore silica sand is used as the filler. The one-part moisture curing type urethane resin composition is used as adhesives, sealants, coating materials coating agents, or the like. Thereby, in the one-part moisture curing type urethane resin composition. gaseous carbon dioxide produced during curing is released into the air. Accordingly, the amount of the residual foam in the cured urethane resin composition is small and adhesive strength is scarcely lowered.