Patent ID: 8602541

Claim:
An ink cartridge comprising: a bag-shaped ink bag that stores ink inside and that includes a spout through which the ink can be drawn out; a substantially box-shaped plastic case that houses the ink bag and that includes at least a first wall portion and a second wall portion, the first wall portion and the second wall portion being a pair of plate-shaped wall portions arranged facing each other, the ink bag being housed in the case such that an axial line of the spout is generally parallel to a longitudinal direction of the case and the spout is disposed in the vicinity of an oblique edge of the first wall portion, the oblique edge being inclined with respect to the axial line; a color indicator portion that is provided to the first wall portion within a range that is set in accordance with a color of the ink stored inside the ink bag, the color indicator portion including at least one protruding portion and indicating whether the color of the ink is a first color or a second color that is different from the first color, each of the at least one protruding portion protruding in an opposite direction from the second wall portion; and a first protruding portion formed by protruding an area of the first wall portion in the opposite direction from the second wall portion, the area covering a size of the spout and being disposed along the oblique edge of the first wall portion, the first protruding portion forming a housing space in which the spout is housed.