The curtain coating apparatus of the invention comprises a sliding face on which a coating solution flows down, a coating width regulating plate which is located on each of both sides of the sliding face and regulates the width of the flow of the coating solution, and an edge guide which is connected to the width regulating plate, and keeps both side edges of free falling stream of the coating solution from the sliding face, wherein a contact angle of water with the coating width regulating plate is greater than a contact angle of water with the edge guide, and the apparatus has solved problems of streaks and uneven thickness at side end portions of a free falling film caused by contraction and teapot phenomenon (residence), by changing wett properties at a coating width regulating plate and an edge guide.