An ink refill container 63 includes a container main body 64 including an ink storage chamber 76, an ink outlet-forming portion 66 provided on an end portion of the container main body forming an ink outlet 65 that allows the ink to flow out from the ink storage chamber, and a valve 74 provided in the ink outlet-forming portion configured to openably seal the ink outlet, in which the ink outlet-forming portion includes a positioning portion 73 on an outer side of the ink outlet-forming portion. in which the positioning portion 73 is closer to the container main body than the valve 74 is to the container main body in a central axis direction of the ink outlet, and in which the positioning portion partially abuts against an ink tank 41-45 when the valve is opened for refilling the ink to the ink tank, to thereby position the valve relative to the ink tank.