The present invention relates to a structural improvement of a roaster, the roasting machine mainly comprising a casing, at least one air inlet portion defined on one side of the casing, at least one air outlet portion defined on one side of the casing, and at least one a heating device on one side of the inlet portion, at least one heat insulating member disposed on the inner side of the casing, at least one accommodating space defined in the heat insulating member for accommodating the coffee beans, and at least one disposed on the baking a control assembly electrically connected to the heating device； thus, when the user wants to roast the coffee beans, the coffee beans can be placed in the accommodating space, and the baking machine is started by the control unit, and the air inlet portion The hot air heated by the heating device is blown into the accommodating space, so that the coffee beans are baked by the hot air, and when the coffee beans are blown by the hot air and disturbed in the accommodating space, the heat insulating elements can be used to accommodate the space. The temperature difference is minimized, the flavor of the coffee beans after baking is better, and the hot air in the accommodation space is discharged through the air outlet.本新型為有關一種烘焙機之結構改良，該烘焙機主要包括有一殼體、至少一界定於該殼體一側之進氣部、至少一界定於該殼體一側之出氣部、至少一設於該進氣部一側之加熱裝置、至少一設於該殼體內側之隔熱元件、至少一界定於該隔熱元件內供容置咖啡豆之容置空間、及至少一設於該烘焙機上且與該加熱裝置電性連結之控制組件；如此，俾當使用者欲烘焙咖啡豆時，可將咖啡豆置於容置空間內，並透過操控控制組件啟動烘焙機，由進氣部將經過加熱裝置加熱過的熱風吹進容置空間，使咖啡豆受到熱風的烘焙，且咖啡豆受到熱風吹動而於該容置空間擾動時，可藉由該隔熱元件使容置空間內溫度差異降到最低，讓咖啡豆經過烘焙後的風味較佳，並且容置空間內的熱風會經由出氣部排出。
