To provide a supporting structure of a differential case which can secure a crush stroke sufficiently, without making the differential case as an obstacle when an impact load is inputted to a side member, and carrying out a buckling of the side member.

A subframe 3 furnishing bending parts 35 and 36 bending in a vertical direction, at both ends in the longitudinal direction, is formed, the play ends of the bending parts 35 and 36 in the subframe 3 are fixed to a side member 1a, and while a differential case 2 is supported to the side member 1a through a front mount 4 and a rear mount 5, the installing position of the front mount 4 to the subframe 3 is displaced in the up and down direction from the installing position of the rear mount 5 to the subframe 3.