To provide a two-chamber support bearing capable of keeping a functional property of a selectable support bearing without having a negative pressure chamber.

This bearing is a two-chamber support bearing having a hydraulic damper, which comprises an operation chamber and a compensation chamber divided each other by a division wall and connected with each other through a damping passage in which pressure oil can flow, or, in some cases, another device damping vibration. The division wall is provided with a penetrating opening which can be closed by an adjusting part 8 on the center part thereof, and an outer wall of the compensation chamber is formed with an elastic bellows 9. The adjusting part 8 forms an integral member 10 with the elastic bellows 9, and an electrical motor 13 adjusts the adjusting part 8 through an adjusting system.