The present invention relates to a cushion for sciatic correction, and the cushion for sciatic correction according to the present invention is to reduce the angle formed by a pair of sciatices located left and right on the buttocks of the human body to collect a pair of sciatices to the center. The upper surface is formed with a curved surface-shaped buttock concave portion which gradually increases as the left and right widths are gradually increased upward to be applied to the buttocks by the weight of the city, and the curved shape is spaced away from the ground toward the center from both left and right ends. Grooves are formed, and both left and right ends thereof have lower surfaces contacting the ground, and are formed of synthetic resin having elasticity. Thereby, a wide open sciatic can be gathered and corrected in the center without a need for a wrong lifestyle or childbirth, and the structure and the method of use can be easily used by the general public.
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