- Laterally -The ischium, and inferior part of the obturator internus.
- Medially – Rectum, and the anal canal, with their associated lavetor ani and sphincter ani muscle.
- Posteriorly- Sacrotuberous ligament and the overlying gluteus maximus muscle.
- Anteriorly-Base of the urogenital diaphragm
- Inferiorly- Skin and deep fascia of the perineum
- Apex – Between obturator fascia and lavetor ani