The apparatus for the brake of the walking support machine is characterized in that a connective tube 41 is formed at an upper part of a bracket 40 for rotatably supporting the wheels 30, a lower part of the body 10 is vertically and movably inserted into the connective tube 41, a brake pin 50 which is in contact with the wheels 30 in a descending state is installed at the lower part of the body 10 to receive elastic power of a spring 60, a pin hole 42 through which the brake pin 50 passes is formed at a center portion of a lower part of the connective tube 41, and a snap ring 70 is inserted into and is fixed to the brake pin 50 projected through the pin hole 42 to the lower part.
