To provide a bar coater capable of uniformly applying a coating fluid to an object for coating.

This bar coater comprises a bar 8 for applying the coating fluid 3 to a flexible support 2, a block unit 6 which is arranged below the bar 8 and supplies the coating fluid 3 between the upper surface of the block unit 6 and the bar 8, and an upstream side guide roller 11a and a downstream side guide roller 11b, both guiding the flexible support 2 to be conveyed. At least, either of the upstream side guide roller 11a or the downstream side guide roller 11b, is formed into such a crown shape that the diameter of the center in the long direction is larger than the diameter of the end part.