NOISE INSULATION MATERIAL FOR AUTOMOBILE

A sound-insulation material for a vehicle has high rigidity and is capable of exhibiting sufficient sound insulation performance against noise having a frequency of 500 Hz to 5000 Hz generated in a vehicle, while maintaining low weight. The sound-insulation material for a vehicle of the present invention has a multilayer structure, the material including: a hard layer 10 having tubular cells, the tubular cells being arranged in a plurality of rows; and a soft layer 30 provided on one surface of the hard layer, in which a ratio of a dynamic spring constant Kd to a static spring constant Ks, of a structure having the hard layer 10 and the soft layer 30, is 0 < Kd/Ks ≤ 1.5.