A roaster for powder and granular material capable of effectively roasting powder and granular material to the inside thereof to provide high quality powder and granular material and capable of effectively avoiding the possibility of causing contamination since the possibility of dewing is less even if the material is cooled. The roaster 1 comprises an charging port 2 in which the powder and granular material is thrown, a drum 30 in which the powder and granular material thrown from the charging port 2 is stored, and a heating unit 49 heating the powder and granular material stored in the drum 30. A preheating chamber 3 in which the powder and granular material thrown from the charging port 2 is preliminarily heated and which communicates with the drum 30 is formed between the charging port 2 and the drum 30.
