A liquid ejecting apparatus includes: a flow channel unit, having a liquid flow channel for supplying a liquid stored in a liquid cartridge; and a plurality of cartridge holders, including a first cartridge holder and a second cartridge holder adjacent to each other, and attached to the flow channel unit while the cartridge holders are arranged in a first direction, each of the cartridge holders adapted to hold the liquid cartridge and having a first engaging portion and a second engaging portion. The first engaging portion of the first cartridge holder and the second engaging portion of the second cartridge holder are engageable with each other to lock the first and second cartridge holders, and the first engaging portion of the first cartridge holder and the second engaging portion of the second cartridge holder are disengageable from each other to unlock the first and second cartridge holders when one of the first and second cartridge holders is moved in a second direction that is apart from the flow channel unit.