To more precisely evaluate and give a warning about the risk of contact between an own vehicle and an obstacle existing in a blind spot from a side portion of the vehicle to its rear portion when the vehicle changes lanes and turns left or right.

The vehicular safety device is provided with: an obstacle sensor 2 which detects the obstacle existing in the blind spot for a driver from both side portions of the own vehicle to its rear portion and calculates the obstacle's speed relative to the own vehicle; a vehicle motion predicting section 3 which detects a sign and direction of at least one of a left or right turn of the own vehicle and its lane change; and a warning evaluation section 4 which judges whether to make a warning section 5 warn the driver that the vehicle is at high risk of contact with an obstacle based on a value of the relative speed calculated by the obstacle sensor 2 if the vehicle motion predicting section 3 has detected the sign and direction and if that obstacle detected by the obstacle sensor 2 exists on the side of the direction detected by the vehicle motion predicting section 3.