An existence probability of an image object based on an image taken by a stereo camera 2 is calculated by an image object existence probability calculating portion 11, an existence probability of a millimeter wave object based on an output of a millimeter wave radar 3 is calculated by a millimeter wave object existence probability calculating portion 12, and an existence probability of a laser object based on an output of a laser radar 4 is calculated by a laser object existence probability calculating portion 13. Further, the respective existence probabilities of the image object, the millimeter wave object, the laser object are corrected based on recognizing rates of the respective recognizing sensors by an existence probability correcting portion 14, the existence probabilities after correction is fused as a fusion existence probability by a fusion existence probability calculating portion 15, thereby, a control of avoiding contact with a hazard or alarming or the like is made to be able to execute by a firm and optimum timing.