Abstract: An apparatus for exchanging guide rollers in a continuous caster has a frame with two laterally spaced sides extending generally transverse to a support. First, second, third and fourth arms are provided, and the first and second arms are operably associated with a first one of the sides and extend in opposite directions and are pivotal about a first axis. Third and fourth arms are operably associated with the other of the sides and extend in opposite directions, and are pivotal about a second axis coaxial with the first axis. Roll engaging elements are associated with a second end portion of each arm, and the second end portion of each arm is remote from the associated axis. First and second double acting cylinder and piston assemblies are provided. Each of the cylinder and piston assemblies is associated with one of the sides, and the pistons of each cylinder and piston assembly are operably associated with the associated arms for causing pivoting thereof about the associated axis.