Abstract: An apparatus for manufacturing a laminated steel sheet by treating surfaces of a base steel sheet so that the adhesive strength between a base steel sheet and lamination sheets is increased. The apparatus comprises an uncoiler for unwinding a coiled base steel sheet followed by a cleaner for cleaning the surfaces of the base steel sheet. The cleaner comprises an acid pickling unit for pickling the surfaces of a hot rolled steel sheet with acid pickling water when the base steel sheet is the hot rolled steel sheet, an alkali cleaning unit for cleaning the surfaces of a galvanized steel sheet with alkali cleaning water when the base steel sheet is the galvanized steel sheet, and a rinsing unit. The acid pickling unit and the alkali cleaning unit are selectively used on the basis of kinds of the base steel sheet supplied from the uncoiler.