A cooling appliance including a locking mechanism configured to fix the door to the main body at a different position from the latch mechanism, in a state where the door fixed to the main body by the latch mechanism closes the cooking chamber, wherein the locking mechanism provided in the door may include a shaft moved to a fixing position, at which the shaft is coupled to the hinge member, or a releasing position, at which the shaft is released from the coupling state, by a repeated pressing manipulation.