To sanitarily and easily dispose underwear such as used underpants and diapers, sanitary goods, and other various types of dirty insanitary matters.

This disposal bag comprises a bag body 2 having a bag inlet 4 and a binding string 5 for closing the bag inlet 4. The bag body 2 further comprises two layers, that are, an outer film layer 6 and an inner film layer 7. The outer film layer 6 is one formed of a low density polyethylene resin, and the inner surface film layer 7 is one formed of a high density polyethylene resin in which a sterilizing agent and a deodorant is mixed. The inner surface film layer 7 is formed thinner than the outer surface film layer 6.