The galvanomagnetic effect has been studied for the ceramic superconductor Y₁Ba₂Cu₃O_x film prepared by the spray pyrolysis method. The hysteresis behavior of the magnetoresistance and the large fluctuation of the output voltage are observed when the applied magnetic field is perpendicular to the surface of the film. However, the hysteresis disappears and the voltage fluctuation is suppressed under the applied magnetic field being parallel to the film surface. These experimental results lead to the realization of the low-noise magnetoresistor without the hysteresis property.