A liquid container which has a bottom surface flatly formed, a first side surface intersecting the bottom surface, and a second side surface intersecting the bottom surface and facing the first side surface, and which accommodates liquid in a liquid accommodation unit and is configured to be detachably mounted in a liquid consuming apparatus having a liquid acquisition needle, the liquid container comprising: a liquid supply unit provided on the bottom surface, at a position closer to the first side surface than the second side surface, and having a liquid outlet which is configured to be inserted into the liquid acquisition needle and make liquid in the liquid accommodation unit flow outside of the liquid container; a contact portion which is electrically connected to the liquid consuming apparatus by mounting the liquid container in the liquid consuming apparatus; and a prism which has a light transmission surface and which is provided on the bottom surface in order to receive an input from the liquid consuming apparatus, and is provided to be able to come into contact with the liquid accommodated in the liquid accommodation unit, wherein the liquid outlet is provided to be closer to the first side surface than the second side surface, and the light transmission surface is provided to be closer to the second side surface than the first side surface, characterized in that the liquid container comprises: an elastic member which is provided on the first side surface, configured to be engaged with the liquid consuming apparatus, and configured to be biased in a direction from the first side surface to the second side surface; a sealing unit which is provided on the bottom surface, at a position closer to the first side surface than the second side surface and in a vicinity of the liquid supply unit, and which is configured to abut onto the liquid consuming apparatus; and a protrusion which is provided on the bottom surface, at a position closer to the second side surface than the first side surface, said protrusion being provided at a position closer to the second side surface than the prism, and in that the contact portion is provided on the first side surface. a liquid supply unit provided on the bottom surface, at a position closer to the first side surface than the second side surface, and having a liquid outlet which is configured to be inserted into the liquid acquisition needle and make liquid in the liquid accommodation unit flow outside of the liquid container; a contact portion which is electrically connected to the liquid consuming apparatus by mounting the liquid container in the liquid consuming apparatus; and a prism which has a light transmission surface and which is provided on the bottom surface in order to receive an input from the liquid consuming apparatus, and is provided to be able to come into contact with the liquid accommodated in the liquid accommodation unit, wherein the liquid outlet is provided to be closer to the first side surface than the second side surface, and the light transmission surface is provided to be closer to the second side surface than the first side surface, characterized in that the liquid container comprises: an elastic member which is provided on the first side surface, configured to be engaged with the liquid consuming apparatus, and configured to be biased in a direction from the first side surface to the second side surface; a sealing unit which is provided on the bottom surface, at a position closer to the first side surface than the second side surface and in a vicinity of the liquid supply unit, and which is configured to abut onto the liquid consuming apparatus; and a protrusion which is provided on the bottom surface, at a position closer to the second side surface than the first side surface, said protrusion being provided at a position closer to the second side surface than the prism, and in that the contact portion is provided on the first side surface. an elastic member which is provided on the first side surface, configured to be engaged with the liquid consuming apparatus, and configured to be biased in a direction from the first side surface to the second side surface; a sealing unit which is provided on the bottom surface, at a position closer to the first side surface than the second side surface and in a vicinity of the liquid supply unit, and which is configured to abut onto the liquid consuming apparatus; and a protrusion which is provided on the bottom surface, at a position closer to the second side surface than the first side surface, said protrusion being provided at a position closer to the second side surface than the prism, and in that the contact portion is provided on the first side surface.