To provide a notifying system for a vehicle capable of grasping the warning content without relying on auxiliary display.

This notifying system 1 for the vehicle notifies a predetermined state change of the vehicle. When detecting the predetermined state change advantageous to a vehicle occupant, a control part 10 enables a notifying means 20 to output a chord of constituting a major chord corresponding to the state change. While, when detecting the predetermined state change disadvantageous to the vehicle occupant, the control part 10 enables the notifying means 20 to output a chord of constituting a minor chord or a discord corresponding to the state change.