PURPOSE: A coffee roaster is provided to minimize the damage by heat loss, and enable to exchange a drum chamber. CONSTITUTION: A coffee roaster comprises the following steps: A case (110) forms an external appearance. A main frame (120) divides the inside of the case into a front compartment (A) and a rear compartment (B). An agitating container (130) is installed inside of the front compartment to be able to ascend and descend, and raw beans which will be roasted are accommodated in the agitating container. A lid is fixed in the upper part of the front compartment inside, and covers the opened upper side of the ascended agitating container. An agitating wing (160) is installed in the lid of the agitating container, and rotates to mix the raw beans in the agitating container evenly. A drive motor (170) is installed as connected to the rotary shaft of the agitating wing, and gives a torque to the agitating wing. A heater (180) is installed in the lid of the agitating container, and rises the inner temperature of the agitating container. A temperature sensor (185) is vertically installed in the lid of the agitating container toward the downward, and measures the temperature of raw beans on the bottom of the agitating container. A controller (190) is installed in the upper end of the rear compartment, receives the temperature signal from the temperature sensor, and controls the operation of the heater and the drive motor. A passage forming plate (152) guides the roasting gas escaped from the exhaust hole of the lid in the agitating container to the exhaust hole of the case. A supplementary heater (152b) is installed in a passage (152a) for the complete combustion of the exhausted roasting gas.본 발명은 커피의 생두를 볶도록 된 커피로스터에 관한 것으로서, 보다 상세하게는 커피의 생두를 소량으로 간편하고 신속하게 로스팅 할 수 있는 커피로스터에 관한 것이다.본 발명에 따른 커피로스터(100)는 외관을 이루는 케이스(110)； 상기 케이스(110) 내부를 전방격실(A)과 후방격실(B)로 구획하는 메인프레임(120)； 상기 전방격실(A)의 내부에 승강가능하게 설치되며, 로스팅될 생두가 담겨지는 교반용기(130)； 상기 전방격실(A)의 내측 상부에 고정되어 상승된 교반용기(130)의 개방
