Spontaneous rupture of renal pelvis is unusual and often occurs in association with an obstructed or infected kidney. Treatment should be prompt and usually requires surgical intervention. Spontaneous rupture of renal pelvis in the absence of any recognizable cause is extremely rare. This is a case report of a 57-year-old woman with spontaneous rupture of renal pelvis without identifiable cause, which was managed successfully by insertion of ureteral stent.