Tank and liquid consuming apparatus including the same

A tank for storing liquid to be supplied to a liquid consuming device, comprising:

• a casing including:
• a first wall defining a first end of the tank in a usable posture of the tank, and
• a second wall defining a second end, of the tank in the usable posture, which faces the first end, the second wall being away from the first wall in a horizontal direction,
• a first chamber and a second chamber which are configured to store the liquid,
• an atmosphere open port,
• a communicating channel communicating with outside of the tank via the atmosphere open port,
• a liquid inlet port via which the liquid is poured into the first and second chambers;
• a first communicating port communicating the first chamber and the communicating channel;
• a second communicating port communicating the first and second chambers, and
• a liquid outflow port via which the liquid stored in the first and second chambers is allowed to flow out of the first and second chambers and toward the liquid consuming section;
• and
• a gas-liquid separating membrane provided in the communicating channel and blocking flowing of the liquid in the communicating channel;
• wherein under a condition that the first wall constructs an upper portion of the tank, that the second wall constructs a lower portion of the tank and that a maximum amount, of the liquid, storable in the tank in the usable posture, is stored in the first and second chambers, the gas-liquid separating membrane is located at a position above a liquid surface of the maximum amount of the liquid.