A surveying apparatus comprising: a distance-measuring unit configured to transmit distance-measuring light and measure a distance to a measurement point by receiving reflected distance-measuring light reflected by a measuring object; an angle-measuring unit configured to measure an angle to the measurement point by detecting an angle of the distance-measuring light; a control arithmetic unit including a survey unit configured to acquire three-dimensional coordinates of the measurement point as measurement data by performing distance and angle measurements by controlling the distance-measuring unit and the angle-measuring unit, a projection image generating unit configured to generate a projection image for displaying the measurement data on a surface of the measuring object by acquiring a three-dimensional shape of the measuring object based on the measurement data, and a projection control unit configured to control projection of the projection image onto the measuring object; and an image projecting unit including a display element configured to form an image as the projection image, a light irradiating device configured to cause projection light to enter the display element, and a projector lens configured to project the projection image emitted from the display element onto the measuring object, wherein the distance-measuring light is pulsed light, and the surveying apparatus is a laser scanner configured to acquire three-dimensional point cloud data of the measuring object by scanning with the distance-measuring light in the vertical direction and the horizontal direction, characterized in that : the projection image generating unit generates , as the projection image, an image displaying levels of point cloud density of the three-dimensional point cloud data in a recognizable manner. a distance-measuring unit configured to transmit distance-measuring light and measure a distance to a measurement point by receiving reflected distance-measuring light reflected by a measuring object; an angle-measuring unit configured to measure an angle to the measurement point by detecting an angle of the distance-measuring light; a control arithmetic unit including a survey unit configured to acquire three-dimensional coordinates of the measurement point as measurement data by performing distance and angle measurements by controlling the distance-measuring unit and the angle-measuring unit, a projection image generating unit configured to generate a projection image for displaying the measurement data on a surface of the measuring object by acquiring a three-dimensional shape of the measuring object based on the measurement data, and a projection control unit configured to control projection of the projection image onto the measuring object; and an image projecting unit including a display element configured to form an image as the projection image, a light irradiating device configured to cause projection light to enter the display element, and a projector lens configured to project the projection image emitted from the display element onto the measuring object, wherein the distance-measuring light is pulsed light, and the surveying apparatus is a laser scanner configured to acquire three-dimensional point cloud data of the measuring object by scanning with the distance-measuring light in the vertical direction and the horizontal direction, characterized in that : the projection image generating unit generates , as the projection image, an image displaying levels of point cloud density of the three-dimensional point cloud data in a recognizable manner. <EOS>