The present invention relates to an oven (1) that comprises a heating chamber (2) wherein the cooking process is performed, a heater disposed inside and at the back side of the heating chamber (2), a rear wall (4) covering the rear side of the heating chamber (2), a fan motor (5) mounted outside the rear wall (4) for rotating the fan (3) in the heating chamber (2), a plate (6) secured outside the rear wall (4) for mounting the fan motor (5) outside the rear wall (4) and wherein the fan motor (5) vibrations transmitted to the heating chamber (2) is prevented by means of the leaf springs (8) disposed between the motor lugs (6) and the plate (6) and the fan motor (4) can be easily mounted and dismounted from the plate (6).