PURPOSE: To obtain an environment recognizing device for a mobile vehicle capable of surely recognizing photography by specifying a photographic candidate point as a true photographic point when it is judged that prescribed relation exists between the amount of travel of the photographic candidate point and that of the mobile vehicle.

CONSTITUTION: The images of right and left wheels inputted from cameras 1, 2 provided at a vehicle and accumulated in memory 3, 4 are inputted to image processing devices 5, 6, respectively, and edge processing by binarization processing is applied to them by the devices. Meanwhile, the images receiving image processing at the devices 5, 6 and a signal from a range finder 8 are inputted to an arithmetic part 7. The range finder 8 is to detect the travelling distance of the vehicle based on the rotation of the wheel 9, and to detect the amount of travel and speed of the vehicle required when the photographic candidate point is recognized. Since it follows that the relative amount of travel between the photography and the vehicle is equal when relative travelling speed between them is equal, an extracted photographic candidate point goes to true photography, therefore, the photography can be surely recognized.