An ink supply apparatus for supplying ink from an ink tank to a recording head includes an atmosphere communication chamber that is connected to the ink tank, a first hollow tube that connects the atmosphere communication chamber to the outside air wherein one end is extended into the atmosphere communication chamber, and a second hollow tube that connects the atmosphere communication chamber to the outside air wherein one end is extended into the atmosphere communication chamber. The length of extension of the second hollow tube is different from the length of extension of the first hollow tube.