A liquid storing cartridge comprising: a liquid container configured to store a liquid; a supply port (85, 109) configured to supply the liquid from the liquid container to an outside of the liquid container; a first positioning part (71, 81) provided in a first side with respect to the supply port (85, 109) in a crossing direction crossing an opening direction of the supply port (85, 109); and a second positioning part (73, 83) provided in a second side with respect to the supply port (85, 109) in the crossing direction, the second side being opposite side from the first side with respect to the supply port (85, 109), wherein: the liquid container includes a case (37, 110) having a first surface; the supply port (85, 109), the first positioning part (71, 81) and the second positioning part (73, 83) are provided on the first surface; the supply port (85, 109) is provided in a connecting part extending from the first surface in the opening direction of the supply port (85, 109); each of the first positioning part (71, 81) and the second positioning part (73, 83) extends from the first surface in the opening direction; characterized in that each of the first positioning part (71, 81) and the second positioning part (73, 83) is longer than the connecting part in the opening direction. a liquid container configured to store a liquid; a supply port (85, 109) configured to supply the liquid from the liquid container to an outside of the liquid container; a first positioning part (71, 81) provided in a first side with respect to the supply port (85, 109) in a crossing direction crossing an opening direction of the supply port (85, 109); and a second positioning part (73, 83) provided in a second side with respect to the supply port (85, 109) in the crossing direction, the second side being opposite side from the first side with respect to the supply port (85, 109), wherein: the liquid container includes a case (37, 110) having a first surface; the supply port (85, 109), the first positioning part (71, 81) and the second positioning part (73, 83) are provided on the first surface; the supply port (85, 109) is provided in a connecting part extending from the first surface in the opening direction of the supply port (85, 109); each of the first positioning part (71, 81) and the second positioning part (73, 83) extends from the first surface in the opening direction; characterized in that each of the first positioning part (71, 81) and the second positioning part (73, 83) is longer than the connecting part in the opening direction. the liquid container includes a case (37, 110) having a first surface; the supply port (85, 109), the first positioning part (71, 81) and the second positioning part (73, 83) are provided on the first surface; the supply port (85, 109) is provided in a connecting part extending from the first surface in the opening direction of the supply port (85, 109); each of the first positioning part (71, 81) and the second positioning part (73, 83) extends from the first surface in the opening direction; characterized in that each of the first positioning part (71, 81) and the second positioning part (73, 83) is longer than the connecting part in the opening direction.