A cartridge detachably mountable to a mounting structure of a liquid consuming apparatus that is provided with a liquid introducing structure, an electrical connecting element and an engagement structure, wherein an X axis, a Y axis and a Z axis are three spatial axes that are orthogonal to one another; an X-axis direction is a direction along the X axis, a Y-axis direction is a direction along the Y axis, and a Z-axis direction is a direction along the Z axis; and in a mounting state that the cartridge is mounted to the mounting structure, direction of gravity is defined as -Z-axis direction, an opposite direction of gravity is defined as +Z-axis direction, one direction in the X-axis direction is defined as +X-axis direction, and the other direction in the X-axis direction is defined as -X-axis direction, the cartridge comprising: a liquid supply portion detachably connected with the liquid introducing structure to supply a liquid to the liquid introducing structure, the liquid supply portion including a base end portion, a leading end portion that forms an opening to receive the liquid introducing structure in the liquid supply portion, and a center axis that is extended in a direction along a +Y-axis direction from the base end portion toward the leading end portion; a contact portion that is located on the +Z-axis direction side of the liquid supply portion and that is arranged to contact with the electrical connecting element in the mounting state; and a positioning structure that is located between the liquid supply portion and the contact portion in the Z-axis direction and that is engaged with the engagement structure, wherein the liquid supply portion is configured to receive a first external force in the -Y-axis direction from the liquid introducing structure when the liquid supply portion is connected with the liquid introducing structure, and the contact portion is configured to receive a second external force in a direction including the -Y-axis direction component from the electrical connecting element when the contact portion contacts with the electrical connecting element; characterized in that: the engagement structure is configured to restrict motion of the cartridge relative to the mounting structure in at least a -Y-axis direction in the mounting state. a liquid supply portion detachably connected with the liquid introducing structure to supply a liquid to the liquid introducing structure, the liquid supply portion including a base end portion, a leading end portion that forms an opening to receive the liquid introducing structure in the liquid supply portion, and a center axis that is extended in a direction along a +Y-axis direction from the base end portion toward the leading end portion; a contact portion that is located on the +Z-axis direction side of the liquid supply portion and that is arranged to contact with the electrical connecting element in the mounting state; and a positioning structure that is located between the liquid supply portion and the contact portion in the Z-axis direction and that is engaged with the engagement structure, wherein the liquid supply portion is configured to receive a first external force in the -Y-axis direction from the liquid introducing structure when the liquid supply portion is connected with the liquid introducing structure, and the contact portion is configured to receive a second external force in a direction including the -Y-axis direction component from the electrical connecting element when the contact portion contacts with the electrical connecting element; characterized in that: the engagement structure is configured to restrict motion of the cartridge relative to the mounting structure in at least a -Y-axis direction in the mounting state.