A liquid supply apparatus includes a container mounting portion and a liquid container. The liquid container includes a case configured to store liquid therein, and a movable member positioned in the case. The movable member and the case comprise a pair of magnetic materials on which a magnetic force acts, such that the pair of magnetic materials attracts each other. When the liquid container is not mounted to the container mounting portion, the movable member is in a fixed state in which the movable member is fixed to the case by the magnetic force acting between the pair of magnetic materials. The container mounting portion includes a release member configured to release the movable member from the fixed state by generating a magnetic force acting between the pair of magnetic materials, such that the pair of magnetic materials separates away from each other.