It is rare to find spontaneous intraperitoneal bladder rupture cases, and they usually have causes such as bladder tumors, tuberculosis, prolonged cystitis, diverticulum, calculus, urethral obstruction, long term placement of an indwelling urethral catheter, and so on. A very few cases have been reported which occurred after drinking alcohol without any organic bladder problems, and its causal relationship has yet to be defined. Recently, a 66-year-old female visited the emergency room. She drank the day before and suddenly had pain in her lower abdomen and dysuria at dawn. Gross hematuria, ascites, and peritoneal irritation signs were observed. Paracentesis was performed, and the ascites examination showed an increase of the creatinine level. After retrograde cystography, it was diagnosed as spontaneous intraperitoneal bladder rupture, and a laparoscopic suture repair was performed. She progressed favorably and went home.