A torsion beam type suspension device comprises a pair of trailing arms (1) spaced from each other axially of an axle and connected at the front ends thereof to a car body and at the rear ends thereof rotatably supporting wheels through brackets, and a torsion beam (2) extending axially of the axle and interconnecting the pair of trailing arms (1) by connecting portions (6) at both ends, the rear ends of the pair of trailing arms (1) being connected to the brackets (8) through rubber cushions, whereby the steering stability can be improved without raising problems about cost, weight and space or without impairing NVH performance associated with road noise, trembling feeling and harshness.
