The present invention provides an ink jet printing apparatus that circulates all the ink to allow the ink jet head to move and also makes it difficult to destabilize discharge of the ink even when the ink jet head is moved. A first pump (34) is provided in a first ink path (31) connecting the first outlet (30t) of a first cartridge (30) with the second inlet (32s) of a second cartridge (32). A second pump (36) is provided in a second ink path (35) connecting the outlet (21b) of the inkjet head (20) with the first inlet (32s) of the first cartridge (30). The second discharge port (32t) of the second cartridge (32) is connected to the inlet (21a) of the ink jet head (20) directly or via a pipe. The relative positions of the second cartridge (32) and the ink jet head (20) are fixed so as to move together with the ink jet head (20).