A liquid cartridge includes a liquid accommodating unit, a delivery channel, a valve, and a locking mechanism. The liquid accommodating unit is configured to accommodate liquid. The delivery channel is configured to discharge the liquid outside. The delivery channel is in fluid communication with the liquid accommodating unit. The valve includes a valve body provided in the delivery channel. The valve body is configured to selectively move between a closed position where the delivery channel is closed and an open position where the delivery channel is open. The locking mechanism includes a locking member configured to selectively move between a locking position to prevent the valve body positioned at the closed position from moving to the open position and a disengaged position to allow the valve body positioned at the closed position to move to the open position.