The utility model relates to a rotary pedal lifting adjusting mechanism for a walking aid.The mobility aid is provided with a chair frame and two pedal main rods which are located at the front ends of both sides of the chair frame and are respectively connected with a pedal body.The lifting adjusting mechanism is installed at the bottom of the pedal main rod.The utility model comprises a pedal main rod and an adjusting seat.The adjusting seat has a plurality of perforations penetrating along the radial direction.The adjusting seat is provided with a first positioning section for locking on the perforation of the pedal main rod and a second positioning section connected with the pedal body.The shape of the first positioning section is corresponding to the pedal main rod.To fit on an outer wall of the pedal main rod.Through the perforation of different heights of the pedal main rod,So that the adjusting seat can rise and fall along the outer wall of the pedal main rod.And adjust the use position of the pedal synchronously.一種助行輔具的旋轉式踏板昇降調整機構，該助行輔具有一椅架及二位於該椅架兩側前端且各自連接一踏板本體的踏板主桿，該昇降調整機構安裝在該踏板主桿的底部，並包含有該踏板主桿及一調整座，該調整座具有複數個沿徑向貫穿的穿孔，該調整座具有一供鎖接於該踏板主桿的穿孔上的第一定位段及一與該踏板本體連接的第二定位段，該第一定位段的外形是對應於該踏板主桿，以供貼合在該踏板主桿的一外側壁上，藉由該踏板主桿其不同高度的穿孔，以使該調整座可沿著該踏板主桿的外側壁作上下昇降，而同步調整該踏板的使用位置。
