Obturator membrane

The obturator membrane (latin: membrana obturatoria) is a strong fibrous joint or syndesmosis that fills the obturator foramen of the hip bone.

The obturator membrane attaches to the margins of the obturator foramen. The obturator membrane almost completely closes the obturator foramen of the hip bone, except for the obturator canal, which serves as a passageway for the obturator blood vessels and nerves.

The obturator membrane provides attachment site for the obturator muscles - the external obturator muscle and the internal obturator muscle.