The liquid delivery system is equipped with a liquid container that is installable on the liquid jetting device, a liquid supply device, and a liquid flow passage member. The liquid container is equipped with a recess portion having an opening provided on a first surface, a container main unit having a liquid delivery portion for delivering liquid to the liquid jetting device, and a sealing film that seals the opening of the recess portion to define together with an inner surface of the recess portion a chamber and a inner flow passage at an upstream side of the liquid delivery portion. The liquid flow passage member is connected to at least one of the chamber and the inner flow passage via a hole provided on the sealing film.