TURN SIGNAL INDICATOR DEVICE

There is provided a turn signal indicator device that drives turn signal indicators (21 and 22) provided on a vehicle based on on/off states of switches (SWR and SWL), and includes an operation state discrimination part (110) that discriminates between first turn signal indication for lane change of the vehicle and second turn signal indication for course change of the vehicle based on on/off signals supplied from the switches (SWR and SWL).