Liquid supply unit

A liquid supply unit configured to be mounted onto a liquid ejection apparatus including an apparatus-side terminal, a liquid introducing portion that protrudes outward from a mounting wall portion of the liquid ejection apparatus, and a guide member that protrudes outward from the mounting wall portion on the same side as a protruding direction of the liquid introducing portion, the liquid supply unit comprising:

• an outer shell;
• a contact portion disposed in the outer shell and configured to electronically connect to the apparatus-side terminal by making contact with the apparatus-side terminal;
• a liquid supply port disposed on the outer shell and used for inserting the liquid introducing portion;
• and
• a hole that is configured to receive the guide member therein, and extends in a direction in which the guide member protrudes outward in a mounting state in which the liquid supply unit is mounted onto the liquid ejection apparatus, at least a part of the hole being located between the liquid supply port and the contact portion in a predetermined direction orthogonal to a direction in which the hole extends.