A kind of roaster for coffee bean includes a shell, a roller, a gear unit and a plurality of burners. Wherein, which can be rotatably set the what enclosure interior, and the roller is cylindrical； The gear unit drives the roller to rotate； In a plurality of burner positions what shell and below setting what roller, those burners are arranged along the outer peripheral surface of the roller in camber line, respectively the burner has a plurality of glory holes along long axial setting, those burner combustion gas are to generate the flame interaction what roller. Thereby, should plus the burner of coffee beans curer caused by thermal energy can be on stepless action what roller, thermal energy that effective use burner generates.一種咖啡豆烘焙機，包含有一殼體、一滾筒、一傳動單元及複數個燃燒器。其中，該滾筒係可轉動地設置於該殼體內部，該滾筒呈圓筒狀；該傳動單元驅動該滾筒轉動；該複數個燃燒器位於該殼體內且設置於該滾筒下方，該些燃燒器沿該滾筒之外周面呈弧線排列，各該燃燒器具有複數個火焰孔沿著長軸向設置，該些燃燒器燃燒瓦斯以產生火焰作用於該滾筒。藉此，該加啡豆烘焙機的燃燒器所產生的熱能可均勻作用於滾筒上，有效利用燃燒器產生的熱能。
