Ink cartridge and inkjet printer

An ink cartridge comprising:

• a case with an air vent;
• and
• a divider configured to divide at least part of the space inside the case into an ink chamber and a waste ink recovery chamber,
• the divider having a waste ink inlet connecting the ink chamber and the waste ink recovery chamber, and
• an air passage connecting the waste ink inlet to the air vent through the ink chamber,
• wherein:
• the case has a plurality of ink chambers arranged in a row,
• the divider has a plurality of can members configured to can the plurality of ink chambers,
• the air passage includes an ink chamber communication path connecting adjacent ink chambers at the ink chamber side of the divider, and
• an air vent communication passage connecting the ink chamber, among the plurality of ink chambers, at one end of the row and the air vent, and
• the waste ink inlet is formed in the cap member, among the plurality of cap members, at the other end of the row.