Introduction: Intraperitoneal rupture of the bladder is considered rare(20%) as compared to extraperitoneal [1]. Idi-opathic rupture of urinary bladder is even rare (1%) [2]. The causes of spontaneous bladder rupture are ill defined and may vary from chronic alcoholism to bladder over distension and trivial trauma such as minor falls.

Case Report: A 62 year old male patient presented to our emergency department with complaints of constipation and absent urine output for last one day. He had no known comorbidities. On examination he had normal vitals with no hypotension. The abdomen was distended, tense, non tender with absent bowel sounds. He was drowsy but arousable with no other neurological deficits. The USG screening in ED showed massive amount of free fluid in Morrison’s pouch. ABG and Chest X Ray were normal. NCCT Abdomen showed moderate to gross free fluid in peritoneal cavity with intraperitoneal rupture of bladder in the dome. He was urgently taken up for exploratory laparotomy which confirmed the CT findings.

Conclusion: This case illustrates a very rare incidence of intraperitoneal urinary bladder rupture with no apparent cause.