Abstract: An electromagnetic brake device for a continuous casting mold. The mold has a rectangular cross section having long sides and short sides. The mold also includes water boxes adjacent at least the long sides. The electromagnetic brake device includes an electromagnet including magnetic poles which are provided respectively at the long sides of the casting mold and are disposed in opposed relation to each other. The magnetic poles have a width generally equal to a width of the long sides of the casting mold. Coils are wound on outer peripheries of the magnetic poles. An iron core is provided in surrounding relation to the casting mold, a portion of the iron core opposite each of the short sides of the casting mold extends through the water boxes located adjacent the long sides of the casting mold. The water boxes include openings through a surface into which the magnetic poles are adapted to be inserted. A backup plate is provided at a side of the water boxes located adjacent the mold.