PURPOSE: An interlaminar floor structure of building is provided to have a good insulation and sound absorption effect by forming a hollow through the generation of a gap. CONSTITUTION: An interlaminar floor structure of building comprises a thermal insulating and sound absorbing layer to the intermediate stacking portion. The thermal insulating and sound absorbing layer is made of the thermal insulating and sound absorbing material. One is selected the synthetic resin system or the rubber between the raw material is inputted in a molding device. The particle type molded material is manufactured with the particle type molded material having a through-hole passing through both sides of particle. The particle type molded material is inputted in a foaming device.
