The film coating device forms a film of a coating liquid on the surface of a material to be coated using an inkjet printer. A print head unit moves in a first direction with respect to a surface of a material to be coated, and a plurality of print heads are continuously mounted on the print head unit over an entire coating width in a direction or orthogonal to a first direction. A fixed control unit is provided on a fixed portion of the film coating device, and a coating control unit is provided on the moving portion of the film coating device. The coating control unit is configured to control a coating state of the plurality print heads and moves together with the print head unit. The coating control unit is connected to the fixed control unit by a transmission line.