An in-vehicle display control device includes a display video data generating unit 31 that obtains captured video data from a rear camera 2 used in capturing the rearward portion of a vehicle, and generates display video data to be displayed in a rearview monitor 3 meant for displaying rearward videos of the vehicle; a range setting unit 35 that sets a first-type range and a second type range with respect to the display video data, the second-type range being placed on either side of the first-type range and positioned in each side portion of the display video data; a video processing unit 36 that, with respect to the video data in the second-type range set by the range setting unit 35, performs an information volume reduction operation for reducing the volume of information to be provided to the driver; and a display control unit 40.