PURPOSE: An automatic cooking apparatus is provided to prevent the direct contact of a top structure and a bottom structure and to improve durability by preventing deformation in case the bottom structure is continuously touched with the steam vapor of high temperature. CONSTITUTION: An automatic cooking apparatus comprises a head main body(11), a bottom body(12), a deformation preventing unit, an internal vessel, a heater, and a grinding blade. A motor and a control device are accepted in the head main body. The bottom body is combined in the head main body. The deformation preventing unit prevents the direct contact of the bottom body and the head main body. The internal vessel has a fixing frame. The internal vessel is fixed to a holding frame which is formed in the deformation preventing unit. The heater heats the internal vessel. The deformation preventing unit is fixed to the bottom body by a projecting frame which is inserted into a bonding groove which is formed in the bottom body. The cutter pulveriz
