Patent ID: 8123343

Claim:
An ink cartridge detachably mountable on a printing apparatus, said ink cartridge comprising: a first wall positioned at a rear side of the printing apparatus when the ink cartridge is mounted to the printing apparatus; a second wall positioned at a front side of the printing apparatus when the ink cartridge is mounted to the printing apparatus; a third wall facing another ink cartridge that is mounted on the printing apparatus alongside of the ink cartridge; and a bottom wall; wherein an ink supply port configured to connect to an ink supply needle of the printing apparatus is provided on said bottom wall; aid ink supply port being located on the bottom wall at a position closer to said first wall than to said second wall; a circuit board having a plurality of contact terminal members configured to electrically connect to a circuit board of the printing apparatus is provided on said second wall; the circuit board on the second wall being located near said bottom wall and being located near said third wall; and said plurality of contact terminal members are arranged in a direction perpendicular to a central axis of the ink supply port.