To improve hanging connection between a fluid curtain and a horizontal guide and to contrive improving quality when guiding a falling curtain by feeding edge fluid having viscosity larger than that of a coating composition in a channel.

In a feeder 14 as a casting device for making a falling curtain 3 of a fluid coating composition, a curtain 3 consisting of a coating composition discharged from casting slots 25 is made to fall from a casting lip 23 for coating a carrier 2. The carrier 2 is guided by a casting roller 1 and continuously conveyed in the direction of the arrow 26. At this time, the falling curtain 3 is guided by side guides 5 at side edges, however at the same time, edge fluid 8 having viscosity larger than that of the coating composition is fed in a channel from an end piece 11 of a discharge means 7, thereby minimizing the effect of disturbance by an edge.