A casting appartaus comprises; a mold including a cavity for solidifying molten metal therein, and a runner and a biscuit portion for introducing the molten metal into the cavity; a unit removably mounted in the biscuit portion for feeding the molten metal through the biscuit portion and runner into the cavity; and a feeding rod disposed in the mold for freely protruding into the runner, and a unit for reciprocating the feeding rod. A mechanism for selecting communication and non-communication between the biscuit portion and the runner may be formed in the casting apparatus. After the molten metal is filled in the mold, the feeding rod is actuated to compress the molten metal in the mold.