Spontaneous trauma to the genital tract during vaginal delivery without instrumentation is very rare. Colporrhexis- rupture of vaginal vault is a very rare type of genital tract injury. A 31 year’s woman P2L2 with a previous one left ectopic pregnancy was referred to our institute within one hour of vaginal delivery as a case of suspected rupture uterus. On Per speculum examination under anaesthesia revealed protrusion of the omentum and intestine into the vagina, colporrhexis of the posterior vaginal wall was suspected which could not be repaired vaginally hence proceeded with laparotomy Opening the abdomen revealed injury of the small intestine also. Total abdominal hysterectomy with the repair of colporrhexis with small bowel resection and anastomosis with temporary ileostomy done. Colporrhexis - a dreadful complication, known to occur both in non-pregnant and pregnant state. It is subdivided into primary or secondary, spontaneous or traumatic, complete or incomplete. We encountered a case of vaginal delivery which had resulted in primary spontaneous complete posterior colporrhexis with small bowel injury