The sciatic notch consists of either of two notches on the dorsal border of the hipbone on each side that when closed off by ligaments form the corresponding sciatic foramina (opening).

It may be a relatively large notch just above the ischial spine that is converted into the greater sciatic foramen by the sacrospinous ligament called also greatersciatic notch or a smaller notch just below the ischial spine that is converted to the lesser sciatic foramen by the sacrospinous ligament and the sacrotuberous ligament; also called the "lesser sciatic notch".