A liquid ejecting apparatus includes a mounting portion on which a liquid container accommodating a liquid is attachably/detachably mounted and a liquid ejecting head configured to eject the liquid supplied through an outlet port of the liquid container. The mounting portion has a locking portion locking the liquid container and a connection unit connected to the outlet port of the liquid container. The connection unit is provided to be attachable/detachable to/from the mounting portion in a state where the locking portion locks the liquid container.