The resistivity and its temperature coefficients were measured on Rh-Fe thin films between 4.2 K and room temperature to estimate their thermometric sensitivity. The films were sputter deposited on sapphire substrates from a Rh-Fe(0.5 atm%) target. The temperature coefficients are close to those of high-purity, well-annealed Rh-Fe(0.5 atm%) wires although the resistivity is higher than that of the wires. Rh-Fe thin film resistors have a high potential for cryogenic thermometers because dilute iron in the films is as effective as that in bulk wires to enhance the temperature coefficients.