Apparatus for controlling hydraulic brakes in bicycles, motorbicycles and the like

Apparatus for controlling brakes in bicycles and the like, comprising a pump (8) connected with a relevant reservoir (88), characterized in that the said reservoir (88) is disposed inside a containment body (3) and exhibits a concave portion (38) shaped complementarily to a handlebar's portion (2) to which the said body (3) is to be fixed.