To provide an improved vehicular axle spring capable of providing a nonlinear characteristic of exhibiting excellent comfortableness and swinging reducing action regardless of a change in sprung weight, while being put in a state of being excellent in durability, without a risk of noise and early abrasion, and without increasing the number of part items.

This vehicular axle spring system is provided by arranging an axle spring A formed by interposing an elastic part 3 of a laminated rubber structure of alternately laminating a plurality of elastic layers 4 and hard partition walls 5 in the radial inner-outer direction in a concentric state with the axis P for respective right-left wheels 16 and 17 between a main shaft 1 and an outer cylinder 2 having mutually the same axis P with this main shaft, and has a communicating passage 13 for making right-left sealed chambers 7 and 7 communicate with each other and a differential pressure regulating valve 14, by arranging an air spring part (b) of sealing air 8 in the sealed chamber 7 in each right-left axle spring A, by forming the sealed chambers 7 between its blocking-up part 6 and the main shaft 1 by blocking up the upper end of the outer cylinder 1.