An apparatus for continuous high temperature gas treatment of particulate matter including a starting material supply port (1) through which starting particulate matter is supplied from an upper part of the apparatus; a treatment, gas supply port (2) through which a treating gas is supplied; a product discharge port (3) through which a product after treatment is discharged from a lower part of the apparatus; a treatment chamber (4) in which the particulate matter is treated with the treatment gas; a gas-solid separation chamber (5) provided in fluid communication with an upper part of the treatment chamber (4); and a cooling chamber (6) provided in fluid communication with a lower part of the treatment chamber (4). A heater (7) is provided on the outer periphery of the upper part of the treatment chamber (4), and a cooler (8) is provided on the outer periphery of the cooling chamber (6).