the invention the body side of one end to the first slide recesses 202 a and at the same level with the base 204 by placing the users calf and having a second sliding grooves on the side facing one side of the saw body with a certain distance from the first slide recess (202) Once the first fixing part 206 which is securely fixed to the vertically upward in the upper surface of the horizontal base (204) It is securely fixed to the inner surface of the first resilient portion 208 to provide an elasticity of the first fixing part 206 Once doedoe securely fixed to vertically upward, the second fixing section 212 having a bearing 210 on the upper portion of the body top surface of the horizontal base (204) at a predetermined distance from the first fixing part 206 The screw rod 214 and is inserted rotatably in a bearing 210 of the second fixing portion (212) One end is securely fixed to the sub-handle 216 and to forward or backward according to the rotation of the or the screw rod 214, wherein a to rotate in the clockwise or counter-clockwise or a screw rod (214) of the or screw rod (214) The second fixing portion 212 from the predetermined distance a with the horizontal base 204 of the upper surface to slidably position soon as at the same time or a screw rod 214 in one end rotatably connected but substituting the body of the end portion in the installed fitting protrusion 217 is a horizontal base with the rotation of the rotation or the screw rod 214 in the first sliding groove 202 and the tab can be inserted sliding in the second sliding grooves 216 of the horizontal base (204) (204 ) and the sliding member 218 to correct the bent legs move forward or backward along the top surface of the Is securely fixed to the inner surface of the sliding member 218. The second elastic portion 220 for providing elasticity in the posture correction device including, in the departure-avoiding the horizontal base 204, line 224, connecting one side of, installing a backboard device 22
