Abstract: This is a non-uniform resistance heating tube constituting a simulated nuclear fuel cluster in a heat transfer test facility for nuclear reactor. This resistance heating tube has a fixed outside diameter and its thickness is molded so that an electric resistance distribution changes continuously corresponding to the power distribution state of nuclear fuel rod in the axial direction of the tube. This resistance heating tube can be obtained by drawing an original pipe, rolling it into an axially uniform thick, then grinding its outer surface so that its thickness becomes non-uniform continuously in the axial direction of the tube, and thereafter smoothing the outer surface of the tube by swaging so that its outside diameter becomes uniform.