A kind of apparatus for roasting coffee includes a body, a roller, a heating unit, a gear unit and an exhausting unit. Wherein, which has in a shell and inner casing setting what shell, and an inlet channel is formed between the what shell and the inner casing, which has an entrance and an outlet, which is arranged on the what shell, which is arranged on the what inner casing. The roller system can be rotatably set in the what inner casing. The heating unit is arranged in the what inner casing, and position what roller lower section. The gear unit is to drive the roller to rotate. The exhausting unit sets the what engine body exterior, to import in the body air from the entrance, and the air in the roller is detached to engine body exterior. Thereby, thermal energy can be effectively reduced by the shell loss of body, and human contact is avoided to scald to body.一種咖啡豆烘焙裝置，包含有一機體、一滾筒、一加熱單元、一傳動單元與一抽風單元。其中，該機體具有一外殼及一內殼設置於該外殼中，一進氣通道形成於該外殼與該內殼之間，該進氣通道具有一入口與一出口，該入口設置於該外殼上，該出口設置於該內殼上。該滾筒係可轉動地設置於該內殼中。該加熱單元設置於該內殼中，且位於該滾筒下方。該傳動單元用以驅動該滾筒轉動。該抽風單元設於該機體外部，用以將空氣自該入口導入該機體內，並將該滾筒內的空氣抽離至機體外部。藉此，可有效減少熱能由機體的外殼逸散，且避免人員接觸到機體而燙傷。
