A projection apparatus includes light source modules (a first light source module, and a second light source module) equipped with a laser light source emitting a laser beam, a light deflection unit configured to perform a two-dimensional scanning with the laser beam emitted from the light source module and project a projection image on an image projection surface, a light detection unit configured to detect a reflection light beam of the laser beam from an operation executor on the projection image, and a control unit configured to determine a position of the projection image with which the operation executor is in contact based on information from the light detection unit and information from the projection image.