A liquid supply system comprising: a liquid ejecting apparatus including: a liquid ejecting head movable in a main scanning direction; a transportation mechanism for transporting a recording medium in a front/rear direction intersecting with a left/right direction, which is the main scanning direction; a tube for supplying a liquid to the liquid ejecting head; and a liquid container for containing ink, the liquid container being arranged following the front/rear direction at a location outside the movement area of the liquid ejecting head in the main scanning direction, the liquid container includes: a liquid containing chamber capable of containing the liquid; an air intake port for taking air into the liquid containing chamber; and a liquid outlet port from which the liquid contained in the liquid containing chamber can flow to the tube, wherein the liquid containing chamber is smaller in the left/right direction than in the height direction, which is orthogonal to the left/right direction and to the front/rear direction, wherein the liquid containing chamber is smaller in the height direction than in the front/rear direction, and characterized by the tube being drawn to a front side, which is downstream in a transport direction of the recording medium than a movement area of the liquid ejecting head, the liquid container including a liquid injection port through which the liquid can be injected into the liquid containing chamber; wherein the liquid outlet port is arranged further to the front side than the center of the liquid containing chamber in the front/rear direction, wherein the liquid containing chamber has one surface side along a longitudinal direction, which is the front/rear direction, becoming a bottom portion, and includes a basal surface which is disposed at the bottom portion, a stepped bottom surface which has a step so as to be higher than the basal surface and is aligned with the basal surface in the longitudinal direction, and a stepped side surface where an upper end side intersects with the stepped botto m surface while a lower end side intersects with the basal surface, and wherein the liquid outlet port is disposed on the basal surface side in the longitudinal direction of the bottom portion. a liquid ejecting head movable in a main scanning direction; a transportation mechanism for transporting a recording medium in a front/rear direction intersecting with a left/right direction, which is the main scanning direction; a tube for supplying a liquid to the liquid ejecting head; and a liquid container for containing ink, the liquid container being arranged following the front/rear direction at a location outside the movement area of the liquid ejecting head in the main scanning direction, the liquid container includes: a liquid containing chamber capable of containing the liquid; an air intake port for taking air into the liquid containing chamber; and a liquid outlet port from which the liquid contained in the liquid containing chamber can flow to the tube, wherein the liquid containing chamber is smaller in the left/right direction than in the height direction, which is orthogonal to the left/right direction and to the front/rear direction, wherein the liquid containing chamber is smaller in the height direction than in the front/rear direction, and characterized by a liquid containing chamber capable of containing the liquid; an air intake port for taking air into the liquid containing chamber; and a liquid outlet port from which the liquid contained in the liquid containing chamber can flow to the tube, wherein the liquid containing chamber is smaller in the left/right direction than in the height direction, which is orthogonal to the left/right direction and to the front/rear direction, wherein the liquid containing chamber is smaller in the height direction than in the front/rear direction, and characterized by the tube being drawn to a front side, which is downstream in a transport direction of the recording medium than a movement area of the liquid ejecting head, the liquid container including a liquid injection port through which the liquid can be injected into the liquid containing chamber; wherein the liquid outlet port is arranged further to the front side than the center of the liquid containing chamber in the front/rear direction, wherein the liquid containing chamber has one surface side along a longitudinal direction, which is the front/rear direction, becoming a bottom portion, and includes a basal surface which is disposed at the bottom portion, a stepped bottom surface which has a step so as to be higher than the basal surface and is aligned with the basal surface in the longitudinal direction, and a stepped side surface where an upper end side intersects with the stepped botto m surface while a lower end side intersects with the basal surface, and