A driving support device includes a camera (21) for taking an image of a peripheral region of an own vehicle through a protection window (211), and a driving support module (10) for displaying a peripheral region screen on a display (50), to thereby support driving of the own vehicle by a driver. The device further includes a washer (22) capable of selectively carrying out any one of air washing of spraying air toward the protection window without spraying liquid and liquid washing of spraying liquid toward the protection window, and a switch section (530) for receiving an operation of instructing which of the air washing and the liquid washing is carried out. The driving support module causes the washer to carry out the air washing when a first operation is carried out; and cause the washer to carry out the liquid washing when a second operation is carried out.