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 elimination of bowel gas. A shorter parallel second conduit terminates on one end in 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. Air, saline solution or sterilized water can be introduced from the syringe through the one-way valves of the extension conduit to inflate the two balloons about the largest central first conduit. The one-way valves prevent deflation of the balloons unless the shorter or shortest parallel conduits are cut to allow the fluid from the two balloons to exit and deflate the balloons.
