Abstract: A conveyor belt idler support includes a fixed frame having support idlers for a return path of the belt. A movable frame is mounted on the fixed frame and is tiltable to support the carrying portion of the belt with a varying degree of tilt to allow the belt extend in a curved path around corners. The fixed frame has a projecting bracket carrying support rollers which extends into a hollow box portion at the center of the movable frame adjacent the middle to support most of the load on the movable frame. The movable frame has a center section and outwardly and upwardly sloping side sections each carrying idlers to define a trough for the belt. At one side, the movable frame carries a upwardly extending guide roller to limit lateral movement of the belt and allow the belt to apply a lateral force to the movable frame to tilt it about the support roller.