A maneuvering assisting apparatus includes a plurality of cameras. Each camera is arranged in a downward attitude on a side surface of a ship hull, and captures surroundings of the ship. A CPU creates a whole-circumference bird's eye view image representing in an aerially viewed manner the surroundings of the ship, based on outputs of these cameras. Also, the CPU transparently multiplexes a graphic image representing at least an extension of the aerially viewed ship, onto the whole-circumference bird's eye view image. Moreover, the CPU non-transparently multiplexes a graphic image representing one portion of the aerially viewed ship, onto the whole-circumference bird's eye view image.