Patent ID: 7543925

Claim:
A liquid container attachable to a container attachment portion of an apparatus, the liquid container comprising: a liquid chamber, accommodating a liquid therein; a liquid supply hole in communication with the liquid chamber and connectable to a liquid receiving portion of the apparatus side; an air open passage causing the liquid chamber to communicate with an outside and introducing outside air into the liquid chamber as the liquid in the liquid chamber is consumed; and an air chamber provided in a portion of the air open passage and capable of storing the liquid entering the air open passage, wherein the air open passage includes: a lower open passage having one end opened to the liquid chamber at a position close to an internal surface of a bottom wall of the liquid chamber and the other end opened to the air chamber at a position close to an internal surface of a bottom wall of the air chamber; and an upper open passage having one end opened to the air chamber at a position close to an internal surface of a ceiling wall of the air chamber and the other end capable of being opened to the outside, wherein the other end of the lower open passage is disposed close to a corner portion of the internal surface of the bottom wall of the air chamber; the one end of the upper open passage is disposed close to a corner portion of the internal surface of the ceiling wall of the air chamber; and the corner portion of the internal surface of the ceiling wall of the air chamber is located diagonally with respect to the corner portion of the internal surface of the bottom wall of the air chamber as viewed in a direction in which the ceiling wall of the air chamber and the bottom wall of the air chamber are opposed to each other.