A washable ostomy pouch configured for accumulating discharged waste and also for draining and washing it without detaching the pouch from the user. The washable pouch has a draining duct and a washing duct which is elevated above the waste level and enables pouring water without waste overflow. The washable pouch has a flat structure. Both the washing and draining ducts have seals. The washing duct has a funnel shape which facilitates pouring water into the pouch, whereby liquefying the discharged waste and enabling easier draining. The abdominal inlet coupling can detachably secure the washable pouch to a snugly fitting abdominal adhesive faceplate coupling which is attached to an abdominal adhesive faceplate that is configured to adhere to the user's abdominal skin surrounding the user's stoma. This allows the user to replace the pouch multiple times without having to detach the abdominal adhesive faceplate.