A painting system includes painting unit including a first painting robot and a second painting robot, a cartridge carrier, and a cleaning tank. The painting robots each include a robot arm including a painting machine. The cartridge carrier includes a cartridge grip part. A first region is a region where a movable region of the painting machine of the first painting robot overlaps with a movable region of the cartridge grip part. A second region is a region where the movable region of the painting machine of the second painting robot overlaps with the movable region of the cartridge grip part. The cleaning tank is provided in a position including at least a part of the first region and at least a part of the second region.