In a vehicular visibility support apparatus (100), a camera (110) positioned on a front portion on a side that is either the left side or the right side of a vehicle provides an image of a view laterally behind the vehicle including a part of a face of the side of the vehicle as a camera image. An input portion (120) accepts input manipulation to generate an input signal. A control portion (130) trims a desired region in the camera image based on the input signal and provides a trimmed image. The control portion trims the camera image based on: a vertical reference line (V) including a part of the face on the side of the vehicle in a trimmed image before the input manipulation is accepted by the input portion, and a horizontal reference line (H1 to H3) orthogonal to the vertical reference line; and a direction of movement for change to the desired region inputted to the input portion.