A combined bearing assembly comprises a thrust bearing receiving a thrust load with a number of rollers interposed between a planar inner member and a planar outer member, a radial bearing consisting of a radial receiving member secured to the inside diameter of a radial flange, the outer peripheral edge portion of the outer member having an outer flange formed by being axially bent, and a restraining member of L-shaped cross section fitted to the outer flange. The inside diameter dimension of the restraining portion of the restraining member is smaller than the outside diameter dimension of the inner member. The inner member and the outer member are prevented from being separated from each other.