An in-vehicle apparatus includes: a camera 1 with a shielded area formed within a photographing area thereof by a light shielding member 1a, which outputs a photographic image of an area surrounding a vehicle photographed through a photographic lens; and an adhering matter detection unit that detects adhering matter settled on the photographic lens based upon images in the shielded area included in a plurality of photographic images output from the camera 1 at different time points.
