This is a small flat band lying deep in the substance of the thigh behind.

Origin.- -From the under surface of the ischium in front of the tuberosity.

Insertion. - Passing in a forward and downward direction it becomes inserted into the posterior aspect of the femur, a little below the bony projection (trochanter minor internus) on the inner side of the bone.

Action. - To extend the femur on the pelvis and adduct the leg.