A sunroof is a cutout in a car's (or truck's) roof that can be opened to provide fresh air and sun to the people inside. A sunroof can be made of the same metal as the rest of the roof, or it can be made of plastic and transparent (usually tinted), in which case it customarily referred to as a moonroof. Moonroofs have a sliding shade in the interior that can be retracted, and were invented by the American Sunroof Company.

Sunroofs can be manual or electric. Manual sunroofs usually work by flipping up to create a small opening around the edges, or being removed completely. Electric sunroofs either flip up and slide back on top of the roof, or down and into the roof. An electric sunroof will have access to close it manually if the motor or control circuitry fails.