A liquid container comprising a container body 1 including a liquid storage space formed therein, and an instilling opening member 2, wherein the liquid container further comprises a sealing portion 5 for hermetically confining liquid in the interior of the container body 1, an unsealing member 6 for opening the sealing portion 5, and a check valve 4 provided at a portion closer to the liquid storage space than the sealing portion 5 and the unsealing member 6 for allowing the unsealing member 6 to open the sealing portion 5 when the instilling opening member 2 is pushed toward the container body 1, and for preventing the liquid from flowing back to the interior of the container body 1.
