The colostomy balloon plug has three parallel conduits with a combined charcoal and hydrophobic filter at one end of the largest central first conduit. The largest central first conduit is open at one end and has the combined charcoal and hydrophobic filter at its other end, for elimnation of bowel gas. A shorter parallel second conduit terminates on one end of a first balloon and on a second end in a first one -way valve. A shortest parallel third conduit terminates on one end in a second balloon and on a second end in a second one-way valve. A syringe and extension conduit is selectively attached to the two one-way valves. The one-way valves prevent deflation of the balloon unless the shorter or shortest parallel conduits are cut to allow the fluid from the two balloons to exit and deflate the balloons.
