A curtain coating apparatus includes a hopper with a slide plane on which the coating solution flows and a hopper lip from where the coating solution begins to freely fall down as a free falling curtain. The apparatus also includes at least a pair of outlets disposed in a position along the edge part of the free falling curtain and situated at a fixed distance down from the hopper lip. Auxiliary solutions are introduced from the width directions so as to maintain the curtain in the width direction.