Braking system wherein brake operating force is made larger than a value corresponding to booster output

A braking system for braking a wheel (10, 12, 14, 16, 210, 212, 214, 216) of an automotive vehicle, including a brake for braking the wheel and an operating device operable to produce an output corresponding to an input thereof, for activating the brake according to the output, and wherein the output of the operating device is delayed with respect to the input depending upon an operating condition of the braking system. The braking system includes a brake-operating-force increasing device (140, 160, 340) operable on the basis of a delay of the output of the operating device (20, 222) with respect to the input, to increase an operating force of the brake (24, 272, 274, 294, 296) to a value which is larger than a value corresponding to the output of the operating device.