A 70-year-old man had an unusual type of supravesical small bowel hernia associated with herniation of the bladder through a traumatic diastasis of the pubic symphysis. The diastasis was closed with prosthetic mesh through a preperitoneal approach. In patients in whom a scrotal hernia develops after a previous pelvic fracture, especially those with evidence of a pubic diastasis, an unusual type of hernia should be suspected. A preperitoneal surgical approach best reveals the anatomy and allows appropriate repair. The best procedure for prevention of such hernias is primary reduction of any substantial pubic diastasis, but operative intervention is not indicated in all patients.