In the case of mounting a liquid storage tank or an intake air resonator on a substantially frame-shaped resin shroud panel (1) with an opening (11d) in which a radiator (2) is disposed, the shroud panel (1) is integrally formed at its both lateral sides with body fastening parts (12, 12) which will be fastened to right and left front side frames (4, 4), respectively, and the body fastening parts (12, 12) are integrally formed on their outsides in the vehicle width direction with casing placement parts (15a, 16a) on which will be placed a casing (15) for a liquid storage tank and a casing (16) for an intake air resonator in proximity to the body fastening parts (12, 12), respectively.