To tramsmit the content of a presented information securely, as well as to reduce the trouble to present the information continuously, when a driver has recognized the content of the information already.

An obstacle around a vehicle is detected by a circumferential condition detecting device 110 having a laser radar 111 or an ultrasonic sensor 112, an information control device 130 selects the information presented to a driver from the detected circumferential condition, and an alarm is displayed on a headup display having a display light projection device 140. A driver condition detecting device 120 detects the variation of the psycological condition of the driver by the variation of the heart beating rate or the like of the driver, and when it is estimated that the driver has recognized the content of the displayed alarm, the display method of the alarm is converted (the brightness is reduced, the display position is changed, the display is stopped, etc.).