To simplify an assembling structure of an exhaust tube to a rear part of a grill case.

In this grill device comprising the grill case incorporated in a cooker main body for receiving and heating a cooked object, the exhaust tube connected to a back face of the grill case for discharging the exhaust in the grill case from an exhaust hole formed on a top face rear part of the cooker main body, a catalyst disposed in the exhaust tube, and an exhaust fan disposed at a downstream side with respect to the catalyst in the exhaust tube, the catalyst is disposed in a catalyst case opened at its top face, and connected with a back face of the grill case, the exhaust fan is integrally received in the exhaust tube, the exhaust tube is detachably locked to a rear portion of the grill case from the top face by a hook portion locked to an exhaust opening of the catalyst case and a locking piece locked to the cooker main body, then the catalyst case and the top face of the exhaust fan are covered by a sheet of a top panel, and the top panel is fixed to the catalyst case and the exhaust tube by screws to fix the exhaust tube to the grill case.