Abstract: A stud type track roller bearing includes a shaft provided with a flange, an annular side plate located in an opposed relationship and fixedly attached to the shaft, a ring fitted onto the flange, a plurality of rollers interposed between the ring and the shaft, a sliding member interposed between the ring and the flange and also between the ring and the side plate, a retainer for retaining the rollers in position. The ring has a pair of opposite flat end surfaces, all of which provide a sliding contact surface. The rollers mainly serve to support the load in the radial direction and the sliding members mainly serve to support the load in the axial direction.