The object of the present invention is to provide a container main body and the fluid-storing container flows out to il is possible to prevent the flow of the contents out of the container body is formed effectively in the space between the inner vessel. The liquid-storing unit 4 of the present invention is to form the outer container 110 and inner container 120, the inner container 120 and the inner space 130 is blocked from the outside between the outer vessel (110) Provision is connected to member 140. When fluid is discharged stored in the inner container 120 by being when the volume of the inner container 120 decreases, the internal space 130, the pressure forced into the inner space 130 in the outer direction. This leak prevention because the connecting member 140, mechanism 149, air is flowing into the internal space 130 from the external pressure, the outer container 110 and inner container 120 in the internal space 130 by the action of the inside of a pressure kept constant. Fluid-storing portion, the connecting member, the liquid dispensing pump, a nozzle head, the valve mechanism