To provide a vertical self-burning carbonization oven for carbonizing organic wastes wherein carbonization is not arrested by the lack of drying heat.

In the vertical self-burning carbonization oven for organic wastes, a primary air-blowing line 8a for blowing air into a refinery zone is connected to a secondary air-blowing line 6a for blowing air into a burning zone. The introduced organic waste is partially burnt and carbonized by the heat of combustion to prepare coals. Here, a drying air-blowing line 22 for blowing air for drying into a drying zone positioned directly above the refinery zone, is established.