A liquid container includes a liquid drain port, a detection chamber, a detection element, a suction portion and a projecting part. The liquid drain port is configured and arranged to supply a liquid to a liquid ejection apparatus. The detection chamber has a bottom surface and a first side wall surface erected from the bottom surface. The detection element is disposed in the detection chamber, and configured and arranged to detect whether or not liquid exists inside the detection chamber. The suction port is provided to the first side wall surface of the detection chamber so that the liquid inside the detection chamber is fed to the liquid drain port via the suction port. The projecting part is provided on the first side wall surface and surrounds at least a part of the suction port.