A liquid ejecting apparatus includes a liquid ejecting unit that ejects a liquid to a medium, a liquid storage unit including at least one liquid container for storing the liquid and located on a front side of the apparatus, an operation panel located on the front side of the apparatus, and through which operations are inputted, and a medium output tray located on the front side of the apparatus to receive the medium discharged. The liquid storage unit and the medium output tray are both protruding forward with respect to the operation panel. The liquid storage unit includes a pivotal cover that opens and closes at least a part of the liquid container, a lock unit that locks the cover with a lock device when the cover is closed, and a lock device mounting base on which the lock device is mounted.