Patent ID: 8548676

Claim:
A vehicle braking device that applies braking force to a tire rotatably arranged on a vehicle body, comprising: a fluid pressure braking unit that allows the braking force to act on the tire; a master cylinder that supplies a fluid pressure to the fluid pressure braking unit; a fluid pressure pipeline unit that transmits the fluid pressure supplied from the master cylinder to the fluid pressure braking unit; a pressure detecting sensor that detects a pressure of the fluid pressure supplied from the master cylinder to the fluid pressure braking unit; a wheel speed detecting sensor that detects a wheel speed of the tire; and a control device provided with a sensor trouble judging unit that judges whether the pressure detecting sensor normally detects the pressure, a braking operation judging unit that judges a state of braking operation, and a control unit that controls operation based on a judgment result of the braking operation judging unit, wherein the braking operation judging unit judges that the braking operation is input when the fluid pressure detected by the pressure detecting sensor is not smaller than a threshold value set in advance in a process of a first mode in which the sensor trouble judging unit judges that the pressure detecting sensor normally detects the pressure, and judges that the braking operation is input when judging that wheel deceleration of the tire detected by the wheel speed detecting sensor is larger than a threshold value in a process of a second mode in which the sensor trouble judging unit judges that the pressure detecting sensor does not normally detect the pressure, and the control unit puts a brake lamp arranged on the vehicle body into a lighting state from a non-lighting state when it is judged that the braking operation is input.