IGNITION TIMING CONTROL DEVICE AND IGNITION TIMING CONTROL SYSTEM

The present invention provides an ignition timing control device and an ignition timing control system which are capable of performing ignition timing control that easily suppresses occurrence of knocking for internal combustion engine that has no function of ignition timing control suppressing the occurrence of the knocking. An ignition timing control device (31) has a knocking detection device (41) that detects knocking of internal combustion engine (1) and an ignition timing adjustment device (43) that receives a knocking signal outputted from the knocking detection device (41) and a signal concerning the ignition timing of internal combustion engine (1) outputted from an external electronic control unit (37) and adjusts the ignition timing of internal combustion engine (1) according to the knocking signal and the signal concerning the ignition timing. Further, the knocking detection device (41) and the ignition timing adjustment device (43) are electrically connected and formed integrally with each other.