A weld bead shaping apparatus including: a gouging torch for gouging an object to be shaped; a shape sensor for measuring a shape of the object; a slider apparatus and an articulated robot for driving the gouging torch and shape sensor; an image processing apparatus; and a robot controlling apparatus. The image processing apparatus includes: a shape data extracting unit extracting shape data of the object, from a measurement result obtained by the shape sensor; and a weld reinforcement shape extracting/removal depth calculating unit calculating a weld reinforcement shape of the weld bead from a difference between the shape data and a preset designated shape of the object, and calculating a removal depth by which gouging is performed, based on the weld reinforcement shape. The robot controlling apparatus controls the slider apparatus, the articulated robot, and the gouging torch based on the weld reinforcement shape and the removal depth.