For providing a coating material cartridge capable of reliably discharging air and coating material stagnated in a hydraulic fluid chamber, a coating material cartridge (l0) has a cartridge main body (11), a partition body (12), a coating material transfer path (17) and a plurality of hydraulic fluid transfer paths (18a, 18b). The partition body (12) partitions the inner region of the cartridge main body (11) into a coating material chamber (13) and a hydraulic fluid chamber (14). Each of the hydraulic fluid transfer paths (18a, 18b) has a plurality of openings that opens in the hydraulic fluid chamber (14) and the distance for each of the openings from the connection end face (11f) is different from each other.