The invention relates to a control device for a step-less speed regulator. The control device can inhibit the degradation of comfort level of vehicle seats, when a second speed control request, which is different from a first speed control request, is generated. The control device comprises an engine for transmitting power to the driving wheels of a vehicle and a step-less speed regulator arranged between the engine and the driving wheels. The control device also comprises an electronic control device A, which controls the step-less speed regulator so as to make the actual rotation speed of the engine come close to the set rotation speed according to the first speed control request; an electronic control device B, which controls the gear ratio of the step-less speed regulator according to the first speed control request and controls the step-less speed regulator so that the ratio of the actual rotation speed of the engine to the set rotation speed is in a preset range, if the second speed control request, which is different from the first speed control request, is generated; and an electronic device C, which reduces the engine torque, according to the actual rotation speed of the engine and the gear ratio of the step-less speed regulator, when the actual rotation speed of the engine changes.