PURPOSE: To eliminate an ink leakage at the time of ink replacement easily and at a low cost, and make the further miniaturization possible.

CONSTITUTION: On an in container box body 1, a cylindrical part 1C as a first opening and a second opening 1D are formed, and a main body absorber 3A is contained in the ink container box body 1, and a joint absorber 3B is contained in the cylindrical part 1C. An ink discharge device part 4 has a protruding part 4A which is fitted in the cylindrical part 1C. When it is taken that the capillarity force of the join absorber 3B is Ka, the capillarity force of the main body absorber 3A is Kb, it is set so that Ka (when joined)≥ Kb; Ka (when joined)≥ Ka (when unjointed); joint when unjointed joint) ≤ Kb take place.