The vacuum amplifier of brakes reduces effort to a brake pedal, facilitating driving. In the vacuum amplifier the diaphragm on both sides of which at a normal operating mode depression is created is used. When braking on the one hand of a diaphragm air, forming atmospheric pressure moves. At the expense of a difference of pressure transmitted through a diaphragm, the pusher moves towards depression (vacuum), providing auxiliary force for braking. At a brake pedal otpuskaniye air is pumped out from a cavity of the amplifier via the control valve, creating depression.