A common rail type fuel injection system provided in an engine with a plurality of cylinders, configured to inject high-pressure fuel stored in a common rail from injectors provided on each of the cylinders under fuel injection control performed by a control unit, and comprising: a plurality of communication lines each of which connects the control unit to a one of the injectors, wherein each of the injectors includes a storage unit configured to store correction information set according to injection characteristics, and a communication unit configured to send the correction information stored in the storage unit to the control unit via a one of the communication lines.