A display controlling device including an image acquiring unit that acquires an image of periphery of a vehicle; a viewpoint position acquiring unit that acquires information related to eye position of an occupant; a horizontal display region setting unit that sets a horizontal display region on a horizontal reference plane parallel to the ground in real space in the input image; a vertical display region setting unit that sets a vertical display region in a vertical reference plane extending in a direction perpendicular to the ground in the input image; a ground projection range applicable rate calculating unit that calculates a ground projection range applicable rate; and a display processing unit that displays the output image on the display unit by associating the coordinates of the input image with the coordinates of the output image displayed on the display unit based on the ground projection range applicable rate.