A soundproofing material for vehicle having a laminated structure
comprising two sound absorbing layers and an interlayer interposed
therebetween, characterized in that the interlayer is formed by bonding
and laminating on the respective side of an air-impermeable film made of
a thermoplastic resin film having a thickness of from 7.mu. to 50.mu.
heat-fusible films having a thickness of from 7.mu. to 50.mu. made of a
thermoplastic resin film having a lower melting point than that of the
air-impermeable film using a multi-layer inflation method and the
soundproofing material is heat pressure-molded so that the heat-fusible
film is melted to cause the sound absorbing layers to be bonded to the
respective side of the air-impermeable film.