Abstract: A drum roaster for roasting beans. The drum roaster includes a housing arrangement having as operating elements at least a bean inlet arrangement and a bean outlet arrangement, a roasting drum for receiving the beans, a drive device which rotates the roasting drum, a heating device which heats the beans, and an insulation element which provides a thermal insulation. At least the bean outlet arrangement is arranged at a front side of the housing arrangement. The roasting drum is rotatably mounted in the housing arrangement. The insulation element is arranged at the front side in a region of the bean outlet arrangement.