A cooking apparatus comprising: a cavity; a steam generator arranged at a rear of the cavity and configured to generate steam; a water supply device and configured to supply water to the steam generator; a steam pipe configured to connect the steam generator to the cavity to supply the steam generated by the steam generator to the cavity; a water supply control valve arranged between the water supply device and the steam generator and configured to adjust a level of water in the steam generator, the water supply control valve including: a housing (no), an inlet portion arranged on an upper end of the housing, and a float configured to move within the housing (no) to open the inlet portion while a level of water in the housing is at a first level, and move within the housing to close the inlet portion while the level of water in the housing is at a second level above the first level; a water supply pipe configured to connect the water supply device to an upper end of the water supply control valve; a connection pipe configured to connect a lower end of the water supply control valve to a lower end of the steam generator; and a drain valve connected to the connection pipe and configured to discharge water in the water supply control valve, the steam generator, and the connection pipe, wherein a buoyancy of the float is greater than gravity caused by a weight of the water supplied by the water supply device and flowing to the water supply control valve, characterized by that the water supply device is arranged above the cavity, and that the float comprises a side surface, wherein one side of the side surface comprises a cutting portion formed to be more spaced apart from an inner surface of the housing than another side of the side surface of the float, wherein the water supply control valve further comprises an outlet portion connected to the connection pipe to discharge the water in the housing to an outside of the housing and arranged below a lower end of the housing to be adjacent to a space between the cutting portion and the inner surface of the housing (no), and wherein the outlet portion is provided in a tubular shape extending in a lower direction from the lower end of the housing and cut obliquely about a vertical direction. a cavity; a steam generator arranged at a rear of the cavity and configured to generate steam; a water supply device and configured to supply water to the steam generator; a steam pipe configured to connect the steam generator to the cavity to supply the steam generated by the steam generator to the cavity; a water supply control valve arranged between the water supply device and the steam generator and configured to adjust a level of water in the steam generator, the water supply control valve including: a housing (no), an inlet portion arranged on an upper end of the housing, and a float configured to move within the housing (no) to open the inlet portion while a level of water in the housing is at a first level, and move within the housing to close the inlet portion while the level of water in the housing is at a second level above the first level; a housing (no), an inlet portion arranged on an upper end of the housing, and a float configured to move within the housing (no) to open the inlet portion while a level of water in the housing is at a first level, and move within the housing to close the inlet portion while the level of water in the housing is at a second level above the first level; a water supply pipe configured to connect the water supply device to an upper end of the water supply control valve; a connection pipe configured to connect a lower end of the water supply control valve to a lower end of the steam generator; and a drain valve connected to the connection pipe and configured to discharge water in the water supply control valve, the steam generator, and the connection pipe, wherein a buoyancy of the float is greater than gravity caused by a weight of the water supplied by the water supply device and flowing to the water supply control valve, characterized by that the water supply device is arranged above the cavity, and that the float comprises a side surface, wherein one side of the side surface comprises a cutting portion formed to be more spaced apart from an inner surface of the housing than another side of the side surface of the float, wherein the water supply control valve further comprises an outlet portion connected to the connection pipe to discharge the water in the housing to an outside of the housing and arranged below a lower end of the housing to be adjacent to a space between the cutting portion and the inner surface of the housing (no), and wherein the outlet portion is provided in a tubular shape extending in a lower direction from the lower end of the housing and cut obliquely about a vertical direction.