Patent ID: 7926926

Claim:
A liquid container comprising: a first surface side and a second surface side opposite to the first surface side; a liquid containing chamber for containing a liquid therein; a liquid supply port for connecting to a liquid receiving portion of an apparatus and supplying the liquid to the apparatus; an atmosphere opening port provided to be located at a lower surface of the liquid container in a gravity direction when the liquid container is mounted on the apparatus; and an atmosphere opening flow passage connecting the atmosphere opening port and the liquid containing chamber, the atmosphere opening flow passage comprising: a liquid trap chamber provided on an upper portion of the liquid container in the gravity direction; a first part of the atmosphere opening flow passage connecting the atmosphere opening port and the liquid trap chamber; and a second part of the atmosphere opening flow passage connecting the liquid trap chamber and the liquid containing chamber, the second part of the atmosphere opening flow passage comprising a connection buffer chamber provided below the liquid trap chamber and comprising a connection flow passage extending upward to connect a lower part of the buffer chamber and the liquid containing chamber, in the gravity direction.