Patent ID: 8544993

Claim:
An ink cartridge comprising: an ink bag comprising two layers of flexible sheets disposed to face each other to form an ink storage portion configured to store ink inside; a spout that is provided on the ink bag and that comprises a hollow portion that leads from a first opening to a second opening, wherein the first opening is communicatively connected with the ink storage portion, and the second opening is provided in a leading end portion of the spout and is open to an outside of the ink bag; and a case configured to house the ink bag, the case comprising: an inclined surface portion; and a penetration portion, wherein the inclined surface portion is a surface portion that is disposed obliquely in relation to an axial direction of the spout, the penetration portion is provided in the inclined surface portion and is opposite the second opening, each of the two layers of flexible sheets extends substantially parallel to a virtual plane that includes an axial line of the spout and that forms a right angle with the inclined surface portion, the spout is positioned further inside of the case than an outer face of the inclined surface portion, and the axial line of the spout is positioned closer to one end portion of the case in a first direction than another end portion of the case, the first direction is orthogonal to the axial direction and to a second direction, and the second direction is orthogonal to the axial direction and to a longitudinal direction of the inclined surface portion.