To easily confirm the fitting of seat belts from the inside and outside by fitting boxes of seat belt fitting confirming lamps at corners of the windshield of a vehicle controlled by road laws and regulations.

Boxes 4 of seat belt fitting confirming lamps 1 are fitted at corners of the windshield of an automobile. The boxes 4 are fitted at the right lower corner for a driver's seat and at the left lower corner for a front passenger seat so that the fitting of seat belts can be confirmed from the inside and outside, particularly from afar at night. A seat belt fitting mark 2 is provided on the seat belt fitting confirming lamp 1, and the portion of blank 3 is colored in green which is a safety color. A device for lighting the lamps 1 via a switch action when the seat belts are fitted is provided. The fitting of the seat belts can be confirmed from a long distance in the daytime and at night while the automobile is not stopped in a police crackdown, and the fitting factor is improved.