The skin layer 10 and the sound-absorbing layer 30 in the on-vehicle intake Enclosures manufacturing method that the adhesive resin layer (50) located between the skin layer fabric 1 and the sound-absorbing layer fabric (3) to prepare, and the thermoplastic resin composition of the adhesive (5) preparation step (S10) for heating and; The thermoplastic resin of the skin layer fabric 1 and the sound-absorbing layer fabric (3), the skin layer fabric 1 so that the thermoplastic resin composition (5) of the heated adhesive to the position between the sound-absorbing layer fabric (3) with the heated adhesive ( 5) the step of supplying rotation between the upper roller (R1) and the lower roller (R2) to (S20) and; The upper roller (R1) and a lower roller the skin layer fabric 1 by the pressure of the (R2) and the thermoplastic resin composition (5) and the sound-absorbing layer fabric 3 are integrated, the skin layer 10 and the sound-absorbing layer (30) and a vehicle intake Enclosures pressure forming step 100 is formed (S30) consisting of the adhesive resin layer (50); doedoe comprises a thermoplastic resin composition (5) of the adhesive is the thermoplastic resin of the adhesive, inorganic ( inorganic matter) powder, thermal curing (thermosetting, 熱 硬化) the resin composition powder, thermosetting resin powder, natural fibers as short fibers, natural wood powder thermoplastic compound resin adhesive selected at least one is configured to further include an air-permeable forming material from, the roller as the pressurized thermoplastic resin is restored, that was by the mineral (inorganic matter) powder, thermal curing (thermosetting, 熱 硬化) the resin composition powder, thermosetting resin powder, natural fibers, staple fibers, at least one air-permeable forming near material selected from natural wood flour Enclosures intake vehicle manufacturing method having a gas-permeable, characterized in that the pores are formed.