Sacrotuberous ligament

The sacrotuberous ligament (also great sacrosciatic ligament or posterior sacrosciatic ligament; latin: ligamentum sacrotuberale) is a fibrous joint or syndesmosis of the human pelvis, one of the vertebropelvic ligaments.

The sacrotuberous ligament extends from the inferior margins of the sacrum to the ischial tuberosity.

Together with another vertebropelvic ligament - the sacrospinous ligament, the sacrotuberous ligament completes the lesser sciatic notch into the lesser sciatic foramen.