Abstract: The present invention relates to a degassing device for an artificial anal bag which is capable of storing the gas generated in the intestines, and of discharging the gas from the bag at a selected place where degassing causes no nuisance to others.It comprises an elongated tube having a filter loaded therein, an opening-and-closing plug attached to its head end and a diverging joint formed at its tail end. The diverging joint can be attached to the circumference of a joint opening, which is made in the upper part of the bag.When the bag is inflated with the gas and excreta from the intestines, the patient can go to the men's room or somewhere for discharging the gas from the bag. Then, the excreta and liquid content are prevented from passing through the filter, only permitting the gas to flow therethrough.