A tank is configured to be installed in a liquid consuming apparatus having a liquid consuming unit and stores liquid to be supplied to the liquid consuming unit. The tank includes a casing that includes: a liquid storage chamber demarcated by a first surface and a second surface different from the first surface, and configured to store the liquid; an inlet provided to inject the liquid into the liquid storage chamber; and a liquid outflow port through which the liquid flows out from the liquid storage chamber to the liquid consuming unit. The casing includes: a frame; a first film composing at least a part of the first surface; and a second film composing at least a part of the second surface.