NOVELTY - The charcoal production apparatus has charcoal furnace (10), water supply unit (12), water disposal unit (13) and water cycle unit (14). The apparatus has a smoke emitting unit (11) provided at the crown of charcoal furnace. The front surface of the furnace is covered with door (16) for carrying in or taking out of timber and the inner wall is made with heat insulating materials (15) such as brick.    USE - For producing charcoal from construction wooden waste material such as used concrete formwork.    ADVANTAGE - The apparatus enables rapid production of charcoal of high quality. Generation of dioxin is prevented.    DETAILED DESCRIPTION - The charcoal production apparatus has charcoal furnace in which the raw material is carbonized, water supply unit for storing and spraying water into the charcoal furnace sealed to a height such that immersion of carbonized raw material is carried out, water disposal unit which ejects water out of charcoal furnace and water cycle unit for supplying ejected water to water supply unit. The apparatus has a smoke emitting unit provided at the crown of charcoal furnace. The front surface of the furnace is covered with door for carrying in or taking out of timber and the inner wall is made with heat insulating materials such as brick. An INDEPENDENT CLAIM is included for production of charcoal, which involves carbonizing raw material of charcoal in charcoal furnace at 1000degreesC or more, sealing charcoal furnace and stopping combustion, immersing carbonized raw material in water in the furnace, adjusting temperature of carbonized raw material to temperature vicinity around the furnace by ejecting water in the furnace, and taking the carbonized raw material out of the furnace.    DESCRIPTION OF DRAWING(S) - The figure shows the longitudinal cross-sectional view of the charcoal production apparatus.    charcoal furnace (10)    smoke-emitting unit (11)    water supply unit (12)    water disposal unit (13)    water cycle unit (14)    heat insulating material (15)    door (16)    observation unit (21)    air path adjustment unit (22)    smoke-emitting hole (23)    smoke-emitting duct (24)    cyclone separator (25)    chimney (26)    burner (32)    filter apparatus (36)    sedimentation tank (37)    circulation pump (38)    feed water tank (39)    hopper (40)