a spacer having the form of conventional c shaped clip formed of a sheet like material or a rod shaped member is interposed between the head portion 15a of the pin and the adjusting lever 16 so as to restrict movement of the adjusting lever in the direction of the thickness of the hand brake lever to a very small range such that the bent portion 16a of the adjusting lever 16 will not disengage from the stop 14a on the hand brake lever while the pawl portion the lower end as viewed in fig1 of the adjusting lever can move towards or away from the ratchet teeth of adjusting nut 13 in assembling the adjusting lever 16 with the hand brake lever 14 as illustrated in fig1 firstly the lever 16 is mounted on the lever 14 by means of the pin 15 at that time there is sufficient clearance between the head portion 15a of the pin 15 and the lever 14 such that the lever 16 can freely rotate around the pin 15 nextly the spring 17 is mounted between levers 14 and 16 and the bent portion 16a of the lever 16 is located to engage with the stop 14a of the lever 14 thereafter the spacer 20 is inserted between the head portion 15a and the adjusting lever 16 the thickness of the spacer 20 is so determined.