The liquid ejection apparatus includes: a liquid ejection head; a carriage that moves in the X direction; a supply roller that is provided at a position closer to a side of the carriage in the −Y direction than to a side thereof in the +Y direction; and a discharge roller that is provided at a position closer to the side of the carriage in the +Y direction than to the side thereof in the −Y direction. A plurality of cartridge slots are provided in the bottom of the carriage on a side in the +Z direction. The plurality of cartridge slots are arranged in the Y direction. The liquid ejection head is provided in the bottom of the carriage on a side in the −Z direction, at a position between the supply roller and the discharge roller, the position being closer to the supply roller than to the discharge roller.