The present invention relates to a liquid vessel and, more specifically, to a liquid vessel having an air inflow shut-off function. The liquid vessel for storing liquid contents comprises a cylindrical body formed of a flexible material, and having an opening part vertically formed in the upper part and an internal receiving space； an injection part inserted in and fixed on the upper part of the body, and having a coupling hole with the opened lower part formed in the vertically lower part and a discharge hole with the opened upper part arranged in the upper part of the coupling hole； a nozzle inserted in and fixed on the coupling hole of the injection part, and having a vertically penetrated through-hole and a stepped part stepped inward from the bottom of the through-hole； and a shut-off unit fitted in the internal circumference of the through-hole of the nozzle to form a gap, having the bottom surface placed on the stepped part of the through-hole to seal the bottom of the through-hole, and formed of a soft material to discharge the liquid contents stored in the body by being deformed by pressure generated when a user pushes the body to be contracted and to seal the bottom of the through-hole by being returned to the original shape when the pressure generated from the body is disappeared. The present invention can prevent the inflow of air into the vessel in which the liquid contents are stored to prevent the contamination of the contents by having the nozzle through which the liquid contents pass and the shut-off unit for selectively opening and closing the nozzle； thereby enabling the liquid contents to be used not disposably but repeatedly to prevent environmental pollution due to the indiscreet disposable use.본 발명은 액상용기에 관한 것으로서, 액상의 내용물을 보관하여 사용토록 하는 액상용기에 있어서, 상부에 수직방향으로 개방부가 형성되고, 내부에 수용공간이 형성되는 통 형태를 갖는 유연성 재질의 몸체； 상기 몸체의 상부측에 삽입 고정되며, 수직방향 하부측에 하부 개방된 결합공이 형성되고, 결합공의 상부측에 상부 개방된 배출공이 결합공에 연통 형성되는 투여체； 상기 투여체의 결합공에 삽입 고정되며, 수직방향으로 관통되는 통공이 형성되고, 상기 통공의 하단
