Coating device, coating method, and method for producing resin film having coating film

The invention relates to a coating device, a coating method, and a method for producing a resin film having a coating film. This coating device comprises: a rotatable coating bar (1) that is arranged inside a container (34) having a coating liquid introduction port and an upper opening; a plurality of pairs of rotatable support bodies (2a, 2b) that are arranged intermittently along the longitudinal direction of the coating bar (1), and that support the coating bar (1) from below; and a weir (37) that is located close to the outer peripheral surface of at least the support body (2b). The positional relationship between the support body (2b) and the weir (37) is determined such that, if a line that connects the axial center (13b) of the support body (2b) and a point (A) which is the end edge of the weir (37) and which is closest to the support body (2b) is defined as a straight line (L1) and if a point where the straight line (L1) intersects with the outer peripheral surface of the support body (2b) is defined