Patent ID: 6955422

Claim:
An ink cartridge detachably mountable on a carriage which is reciprocally movable in a recording apparatus and which has a electrode, an engagement portion and an ink supply needle, the ink cartridge comprising: a container that stores ink therein and has an ink supply port connectable to the ink supply needle, the ink supply port being located in a leading end side in an insertion direction of the container into the carriage, the container further having first and second surfaces opposite each other, the first surface being substantially parallel to the insertion direction of the container into the carriage; a memory device having at least one electrode for electrical connection to the electrode of the carriage, the at least one electrode of the memory device being fixed relative to the first surface of the container; and a retaining member disposed on the first surface of the container, and having a movable engagement portion that can shift position relative to the first surface of the container and which is located at a trailing end side relative to the at least one electrode of the memory device in the insertion direction of the container into the carriage, and which is engageable with the engagement portion of the carriage.