A liquid cartridge configured to be inserted into a liquid consuming apparatus in a first direction (51, 57) along a horizontal direction against an urging force directed in a second direction (52, 58) opposite the first direction, and thereby to be mounted to the liquid consuming apparatus, comprising: a liquid chamber configured to store liquid therein; a front face facing the first direction when the liquid cartridge is inserted into the liquid consuming apparatus; a liquid supply portion positioned at the front face and configured to allow insertion of a liquid supply tube of the liquid consuming apparatus thereinto; a seal member positioned at the liquid supply portion and having a liquid supply opening formed therethrough, wherein the seal member is configured to contact an outer surface of the liquid supply tube while being elastically deformed when the liquid supply tube is inserted through the liquid supply opening; an upper face (39, 141) facing an upward direction when the liquid cartridge is inserted into the liquid consuming apparatus; a lock surface positioned at the upper face and configured to contact a lock portion of the liquid consuming apparatus in the second direction; and a rear face facing the second direction when the liquid cartridge is inserted into the liquid consuming apparatus, wherein the liquid cartridge is configured to pivot about a pivot center which is a center of the liquid supply opening, when the liquid cartridge is inserted into the liquid consuming apparatus and the liquid supply tube is inserted through the liquid supply opening, wherein the liquid cartridge is configured to pivot between a first attitude and a second attitude, wherein when the liquid cartridge is in the first attitude, the lock surface contacts the lock portion in the second direction and movement of the liquid cartridge relative to the liquid consuming apparatus in the second direction is restricted, and wherein when the liquid cartridge is in the second attitude, the lock surface is positioned further in a downward direction than the lock portion, wherein the downward direction is the gravitational direction, and the rear face comprises a first portion and a second portion positioned further in the upward direction than the first portion, wherein the first portion comprises a portion positioned further in the downward direction than the pivot center, and the first portion is positioned further in the first direction than the second portion, wherein the liquid cartridge further comprises an electrical interface positioned at the upper face and configured to contact a contact provided in the liquid consuming apparatus when the liquid cartridge is in both the first attitude and the second attitude in the liquid consuming apparatus, wherein when the liquid cartridge is in the second attitude, a position of the pivot center along the first direction and a position of the electrical interface along the first direction at least partly overlap. a liquid chamber configured to store liquid therein; a front face facing the first direction when the liquid cartridge is inserted into the liquid consuming apparatus; a liquid supply portion positioned at the front face and configured to allow insertion of a liquid supply tube of the liquid consuming apparatus thereinto; a seal member positioned at the liquid supply portion and having a liquid supply opening formed therethrough, wherein the seal member is configured to contact an outer surface of the liquid supply tube while being elastically deformed when the liquid supply tube is inserted through the liquid supply opening; an upper face (39, 141) facing an upward direction when the liquid cartridge is inserted into the liquid consuming apparatus; a lock surface positioned at the upper face and configured to contact a lock portion of the liquid consuming apparatus in the second direction; and a rear face facing the second direction when the liquid cartridge is inserted into the liquid consuming apparatus, wherein the liquid cartridge is configured to pivot about a pivot center which is a center of the liquid supply opening, when the liquid cartridge is inserted into the liquid consuming apparatus and the liquid supply tube is inserted through the liquid supply opening, wherein the liquid cartridge is configured to pivot between a first attitude and a second attitude, wherein when the liquid cartridge is in the first attitude, the lock surface contacts the lock portion in the second direction and movement of the liquid cartridge relative to the liquid consuming apparatus in the second direction is restricted, and wherein when the liquid cartridge is in the second attitude, the lock surface is positioned further in a downward direction than the lock portion, wherein the downward direction is the gravitational direction, and the rear face comprises a first portion and a second portion positioned further in the upward direction than the first portion, wherein the first portion comprises a portion positioned further in the downward direction than the pivot center, and the first portion is positioned further in the first direction than the second portion, wherein the liquid cartridge further comprises an electrical interface positioned at the upper face and configured to contact a contact provided in the liquid consuming apparatus when the liquid cartridge is in both the first attitude and the second attitude in the liquid consuming apparatus, wherein when the liquid cartridge is in the second attitude, a position of the pivot center along the first direction and a position of the electrical interface along the first direction at least partly overlap.