To provide a liquid container which is excellent in assemblability and houses cosmetic ink, correcting fluid, etc.

The container is provided with: a main body 12 having a tank part T for housing the liquid and having a supply port on the distal end side; a piston 22 moving forward in the tank part T; a piston rod 24 extending backward and integrated with the piston 22; an operation cylinder 30 fitted to the rear part of the main body 12 in a relatively rotatable manner; and a rotation prevention cylinder 26 fixed to the rear inside of the main body 12 in a relatively non-rotatable manner. Between the operation cylinder 30 and the rotation prevention cylinder 26, a conversion mechanism for converting the relative rotation between the operation cylinder 30 and the main body 12 to the movement of the piston rod 24 in an axial direction to the main body 12 is constituted, and a rotating direction regulation mechanism for regulating the rotating direction of the operation cylinder 30 and the main body 12 to be one direction is constituted, and while an annular projecting part 26f formed at the rotation prevention cylinder 26 is fitted into an annular recess part 30d formed at the operation cylinder 30 to connect the operation cylinder 30 and the rotation prevention cylinder 26 integrally with each other.