A saddled vehicle can comprise a handlebar on tip ends of which are provided a grasping grip to be grasped by a driver and a throttle grip for an accelerator operation, a first brake device and a second brake device for performing a braking operations. The vehicle can also include a gradient detector for detecting a road gradient during travel of the vehicle, and a deceleration adjustment device for automatically adjusting the deceleration of the vehicle in accordance with the road gradient detected by the gradient detection device and operation conditions of the first brake device and the second brake device.