There is disclosed a drainage apparatus capable of allowing the fluid flowing via diverse paths to flow via one path, the drainage apparatus comprising a first inlet pipe fluid flows in, a second inlet pipe fluid flows in, an outlet pipe in communication with the first inlet pipe and the second inlet pipe, a first outlet hole in contact with the first inlet pipe and the outlet pipe and a second outlet hole in contact with the second inlet pipe and the outlet pipe, wherein the first outlet hole and the second outlet hole are provided not to face each other directly.