A liquid consuming apparatus comprising; a liquid cartridge configured to be inserted into the liquid consuming apparatus in a first direction along a horizontal direction against an urging force directed in a second direction opposite the first direction, and thereby to be mounted to the liquid consuming apparatus, wherein the liquid cartridge comprises: 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; an upper face 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 an operation surface positioned at the upper face and positioned further in the second direction than the lock surface, wherein the operation surface is not movable relative to the liquid chamber, wherein the liquid cartridge is configured to pivot between a first attitude and a second attitude when the liquid cartridge is inserted into the liquid consuming apparatus, wherein when the liquid cartridge is in the first attitude, the lock surface contacts the lock portion in the second direction, 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, wherein when the liquid cartridge is in the first attitude, at least a portion of the operation surface protrudes further than the lock surface in the upward direction, the liquid consuming apparatus further comprising: a cartridge mounting portion , wherein the liquid cartridge is configured to be inserted into the cartridge mounting portion in the first direction against the urging force directed in the second direction, and thereby to be mounted to the cartridge mounting portion, and the cartridge mounting portion comprises: a liquid supply tube configured to be inserted into the liquid supply portion; and a lock portion configured to contact the lock surface . 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; an upper face 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 an operation surface positioned at the upper face and positioned further in the second direction than the lock surface, wherein the operation surface is not movable relative to the liquid chamber, 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 an operation surface positioned at the upper face and positioned further in the second direction than the lock surface, wherein the operation surface is not movable relative to the liquid chamber, a cartridge mounting portion , wherein the liquid cartridge is configured to be inserted into the cartridge mounting portion in the first direction against the urging force directed in the second direction, and thereby to be mounted to the cartridge mounting portion, and the cartridge mounting portion comprises: a liquid supply tube configured to be inserted into the liquid supply portion; and a lock portion configured to contact the lock surface . a liquid supply tube configured to be inserted into the liquid supply portion; and a lock portion configured to contact the lock surface . <EOS>