Spontaneous rupture of the ureteropelvic junction is a rare entity with diagnostic problems. Here, we reported a case who presented with severe acute abdominal pain mimicking many abdominal problems. Physical examination and laboratory tests did not reveal any specific diagnosis, and an abdominal computed tomographic scan was performed. It showed 4-mm calculus in proximal ureter, grade 2 hydronephrosis, and perinephric fluid collection. The patient undergone to systoscopic procedure, her calculus was removed, and a double-J catheter was placed. The next day, she was discharged without any complication.