A surveying instrument includes a distance measuring unit which irradiates an object with the distance measuring light and measures a distance to the object based on the reflected distance measuring light from the object, wherein the distance measuring unit includes a distance measuring light projecting module configured to project the distance measuring light and a distance measuring light receiving module configured to receive the reflected distance measuring light, the distance measuring light receiving module includes a dichroic prism and a light receiving module, and the dichroic prism is configured in such a manner that the reflected distance measuring light is internally reflected in the dichroic prism at least three times and then received by the light receiving module.