Provided is a coating device that forms a band-shaped coating film that has low disorder in the shape at the starting end and ending end. The coating device comprises a supply unit that supplies a coating liquid and a coating unit (3) that causes the coating liquid supplied from the supply unit to coat a substrate at a predetermined width, wherein the coating unit (3) has: a supply opening (4) through which the coating liquid is supplied; a first buffer chamber (5) that distributes the coating liquid flowing in from the supply opening (4) in the widthwise direction; a resistance pathway (6) that imparts to the coating liquid flowing in from the first buffer chamber (5) a greater fluid resistance than the fluid resistance in the first buffer chamber (5); a second buffer chamber (7) that distributes the coating liquid flowing in from the resistance pathway (6) in the widthwise direction; an on-off valve (8) that is provided within the second buffer chamber (7) and that controls the cutoff of the interconnection between the upstream and downstream of the second buffer chamber (7); and a slit nozzle (10) that discharges the coating liquid flowing in from the second buffer chamber (7) through the on-off valve (8) to the substrate at a predetermined width.