PURPOSE: A height adjusting device of a leg protector is provided to quickly, accurately, and conveniently achieve a height adjustment and to adjust the height without a replacement of a heel. CONSTITUTION: A height adjusting device of a leg protector comprises a heel separately equipped in a footwear sole of a leg protector； a supporter(10) respective fixed in a forward and a backward in a heel bottom side of a sole and hinge-combines a leading end of a sole and a leading end of a heel； a screw(20) which is combined with shaft seal in order to be axis rotatable on a spot in a state penetrated and connected between a forward and a backward supporter； a transfer member which is combined with shaft seal into the screw between a forward and a backward supporter and which transfers to a front and a rear according to a rotation of the screw； a link bar(40) in which one end is hinge-combined to both sides of the transfer member and the backward supporter in a respectively and in which another end is hinge-combined in a state connected mutually； and a guide groove(51) of a guide plate(50) formed with protruding to both top sides of the heel and in which another end of the link bar is hinge-combined.본 발명은 다리에 부상을 입었을 때 깁스 대신 착용하여 부상부위를 보호하기 위한 다리보호대에 관한 것으로, 더 상세히 설명하면 신발 밑창에 굽을 별도로 구비하여 밑창의 선단과 굽의 선단을 힌지결합하고, 밑창과 굽의 뒤꿈치에는 나사봉의 회전에 따라 전후 링크가 벌어지거나 좁혀지면서 밑창과 굽 사이의 높이를 조정할 수 있게 함으로써, 다리보호대의 신발 뒤꿈치에 대한 높이조정을 용이하게 할 수 있도록 한 다리보호대의 높이조정장치를 제공한다.
