There is provided with a cartridge comprising a liquid supply portion; a contact portion that is located on a +Z-axis direction side of the liquid supply portion and that is arranged to contact with an electrical connecting element; and a positioning structure that is located between the liquid supply portion and the contact portion in a Z-axis direction. The liquid supply portion is configured to receive a first external force in a −Y-axis direction from the liquid introducing structure when the liquid supply portion is connected with the liquid introducing structure. The contact portion is configured to receive a second external force in a direction including a −Y-axis direction component from the electrical connecting element when the contact portion comes into contact with the electrical connecting element. This configuration suppresses position misalignment of the cartridge or a connector to a mounting structure.