Abstract: A casting apparatus for a cylinder head and heat treatment method for a cylinder head manufactured by the apparatus is provided. The casting apparatus for a cylinder head is connected with a mold by a pressing unit and a connection pipe and casts a product by pressing and injecting molten metal into the mold. A heat treatment method for the cylinder head manufactured by the apparatus includes: a molten metal supply unit that stores and stabilizes supplied molten metal and a pressing unit that is separately formed from the molten metal supply unit, receives the stabilized molten metal from the molten metal supply unit, and supplies the molten metal to the mold. In addition, a stopper that is soaked in the molten metal in the molten metal supply unit controls the amount of molten metal sent to the pressing unit.