A vehicle periphery monitoring device comprising: a plurality of imaging units (110, 810) mounted on a vehicle and configured to capture images of a vehicle periphery; an image brightness calculation unit (300, 1000) configured to calculate average values of pixel values in predetermined areas in a plurality of images taken by the plurality of imaging units; an image transformation unit configured to perform a coordinate transformation process on the plurality of images taken by the plurality of imaging units; an image combining unit (200, 203) configured to combine the plurality of images to which the coordinate transformation process is performed to form an image looking down from an overhead virtual viewing point; a traveling direction judgement unit configured to judge a traveling direction of the vehicle or whether a shift position is in a reverse gear position; an imaging-unit-selecting unit configured to select, from the plurality of images taken by the plurality of imaging units, an image for a forward direction of the vehicle on the basis of the traveling direction judged by the traveling direction judgment unit or to select an image for a backward direction of the vehicle on the basis of the shift position in a reverse gear positon judged by the traveling direction judgement unit; an image display unit (400, 1100) configured to simultaneously display the image looking down from an overhead virtual viewing point, formed by the image combining unit and the image selected by the imaging-unit-selecting unit; and a brightness correction unit (120, 820) configured to correct brightness of the images other than the image selected by the image-unit-selecting unit in the plurality of images taken by the plurality of imaging units based on the average values calculated by the image brightness calculation unit, characterized in that the brightness correction unit (120, 820) corrects the brightness of each of the images other than the selected image based on a difference between the average value of the selected image and the average values of the images other than the selected image, the predetermined areas in the plurality of images other than the selected image are imaging areas which are overlapped among the plurality of images when the plurality of images are combined, and the image combining unit (200, 203) combines the selected image in which the brightness is not corrected and the plurality of images in which the brightness is corrected by the brightness correction unit. a plurality of imaging units (110, 810) mounted on a vehicle and configured to capture images of a vehicle periphery; an image brightness calculation unit (300, 1000) configured to calculate average values of pixel values in predetermined areas in a plurality of images taken by the plurality of imaging units; an image transformation unit configured to perform a coordinate transformation process on the plurality of images taken by the plurality of imaging units; an image combining unit (200, 203) configured to combine the plurality of images to which the coordinate transformation process is performed to form an image looking down from an overhead virtual viewing point; a traveling direction judgement unit configured to judge a traveling direction of the vehicle or whether a shift position is in a reverse gear position; an imaging-unit-selecting unit configured to select, from the plurality of images taken by the plurality of imaging units, an image for a forward direction of the vehicle on the basis of the traveling direction judged by the traveling direction judgment unit or to select an image for a backward direction of the vehicle on the basis of the shift position in a reverse gear positon judged by the traveling direction judgement unit; an image display unit (400, 1100) configured to simultaneously display the image looking down from an overhead virtual viewing point, formed by the image combining unit and the image selected by the imaging-unit-selecting unit; and a brightness correction unit (120, 820) configured to correct brightness of the images other than the image selected by the image-unit-selecting unit in the plurality of images taken by the plurality of imaging units based on the average values calculated by the image brightness calculation unit, characterized in that the brightness correction unit (120, 820) corrects the brightness of each of the images other than the selected image based on a difference between the average value of the selected image and the average values of the images other than the selected image, the predetermined areas in the plurality of images other than the selected image are imaging areas which are overlapped among the plurality of images when the plurality of images are combined, and the image combining unit (200, 203) combines the selected image in which the brightness is not corrected and the plurality of images in which the brightness is corrected by the brightness correction unit.