To provide a system for informing occurrence of a traffic troubles in a course from a starting point to a goal to a user, before starting.

The traffic trouble informing system comprising an information center 10, connected with user information terminals 20-22 and traffic information centers 30-32 providing various kinds of traffic information via communication means 40 and 41 is provided with a means S10 for registering a movement schedule including course information and time information received by the information terminals 20-22, a means S11 for monitoring occurrence of a traffic trouble having an effect on the movement schedule based on the movement schedule and the traffic information, and a means S15 for informing information concerning to occurrence of a traffic trouble to the information terminals 20-22, the occurrence of a traffic trouble having an effect on the movement schedule.