A continuously variable belt transmission for a vehicle which can generate a cancellation hydraulic pressure for cancellation with a simple construction, as well as urge a movable sheave in the direction for producing a belt pressing force even at the time a vehicle is towed. A member to form a first hydraulic chamber P1 where a pressing force acting on the movable sheave is generated and a circular member forming a part of a second hydraulic chamber P2 where a hydraulic pressure is generated to cancel a centrifugal hydraulic pressure generated in the first hydraulic chamber P1 are provided, wherein the circular member is formed of an elastic member urging the movable sheave in the direction for generating the belt pressing force at a position of the movable sheave in a predetermined gear ratio.