A sheet coating apparatus for coating a coating liquid on a sheet traveling along a predetermined transfer path, including a storage tank in which the coating liquid is contained, a coating roller which is in contact with the sheet and which is rotatably installed on the transfer line, for coating the coating liquid supplied from the storage tank on the surface of the sheet, and a coated amount regulating mechanism which is securely pressed against the surface of the coating roller which regulates the amount of the coating liquid coated on the sheet by squeegeeing the coating liquid sticking on the surface of the coating roller. The sheet coating apparatus can prevent excess coating liquid from being coated on a sheet by regulating the amount of the coating liquid coated on the sheet, thereby attaining uniform coating.