A liquid container comprising: a container body that is detachably attached to a container attachment unit of a liquid consumption apparatus so as to supply liquid retained in an ink retainer portion inside thereof to the liquid consumption apparatus; a first and a second positioning portions that are provided on a first outer wall surface of the container body with a certain distance provided therebetween so as to prevent the move of the container body in a direction along the first outer wall surface thereof when a first and a second positioning members fit therein, respectively, the first and the second positioning members being provided on a first opposing surface of the container attachment unit to which the first outer wall surface thereof is opposed in an attached state; a liquid feed outlet that is provided on the first outer wall surface of the container body in such a manner that a liquid supply unit, which is provided on the first opposing surface, is communicated with the ink retainer portion inside therethrough; an information memory unit; electric contacts that are provided in the proximity of the first positioning portion on a second outer wall surface of the container body which is orthogonal to the first outer wall surface thereof, the electric contacts causing the information memory unit provided on the container body to be connected to an information control circuit of the liquid consumption apparatus when the electric contacts are press-contacted with a connection terminal, which is provided on a second opposing surface of the container attachment unit that is opposed to the second outer wall surface in an attached state; and an engaging portion preventing the detachment of the container body from the container attachment unit when an engaging member provided on the second opposing surface engages therewith, characterized in that the engaging portion is provided at the second-outer-wall-surface side when viewed from a central axis of the first positioning portion. a container body that is detachably attached to a container attachment unit of a liquid consumption apparatus so as to supply liquid retained in an ink retainer portion inside thereof to the liquid consumption apparatus; a first and a second positioning portions that are provided on a first outer wall surface of the container body with a certain distance provided therebetween so as to prevent the move of the container body in a direction along the first outer wall surface thereof when a first and a second positioning members fit therein, respectively, the first and the second positioning members being provided on a first opposing surface of the container attachment unit to which the first outer wall surface thereof is opposed in an attached state; a liquid feed outlet that is provided on the first outer wall surface of the container body in such a manner that a liquid supply unit, which is provided on the first opposing surface, is communicated with the ink retainer portion inside therethrough; an information memory unit; electric contacts that are provided in the proximity of the first positioning portion on a second outer wall surface of the container body which is orthogonal to the first outer wall surface thereof, the electric contacts causing the information memory unit provided on the container body to be connected to an information control circuit of the liquid consumption apparatus when the electric contacts are press-contacted with a connection terminal, which is provided on a second opposing surface of the container attachment unit that is opposed to the second outer wall surface in an attached state; and an engaging portion preventing the detachment of the container body from the container attachment unit when an engaging member provided on the second opposing surface engages therewith,