An ink cartridge apparatus for continuously supplying ink is provided, including a connection device, an exposed chip socket and a filtering device on an ink cartridge main body. The connection device is for connecting to an ink bottle and the filtering device is for filtering the impurity from the ink flowing from the ink bottle into ink cartridge main body. The exposed chip socket is for the user to replace the chip more conveniently. With the ink supply mechanism of ink bottle into ink cartridge main body, the ink cartridge main body can maintain good ink quality and when the threshold set by the chip is exceeded, the replacement of the chip can be done without removing the entire ink cartridge from the printer so as to achieve the object of continuously supplying ink.