Environmental problems have become a very important conditions in recent years. Due to this, the issue of maritime waste treatment control has been taken up by concerned parties. The discharge of waste from a maritime vessel is permitted with certain attached conditions. However, the worldwide trend conceming maritime waste treatment has increased to the point where the regulations conceming this are similar in strength to those relating to waste treatment on land. The authors investigated the quantity, content and the treatment method during an extended voyage of the Nagasaki University training ship, Kakuyo-maru. As a result of this research, the total of the non-bumable waste amounted to 367kg (aluminium cans : 52kg, steel cans : 36kg, bottles : 279kg) during a 55 day voyage. In the future, from the viewpoint of the prevention of air pollution and dioxin discharge it will be up to the fishing industry to halt the incineration of plastics and reduce the quantity of shipboard waste.
