Provided is a robot cleaner. The robot cleaner includes a casing (10) including a moving unit (20), an image input unit (40) disposed in the casing (10), the image input unit (40) including a plurality of light emitting parts (41,42) for emitting light toward an obstacle and an image sensor (43) for acquiring a 3D image of the obstacle onto which light is emitted from the plurality of light emitting parts (41,42), and a main control unit (60) extracting 3D data with respect to the obstacle from the 3D image of the obstacle acquired by the image input unit (49) to control the moving unit (20).