A heating and cooking apparatus has a kneading trough detachably installed in a heating chamber of the apparatus and provided with a handle for easy carrying for a user. Since both the kneading trough and a portion to be engaged with the kneading trough in the heating chamber are formed square, the force in the rotating direction during the operation can be positively received by the corners, thereby enhancing the strength of the apparatus, without rattlings or wearing-out or disengagement of the engaging portion therebetween.