The paper discusses the results of an experimental investigation of an anomalous galvanomagnetic effect in an evaporated indium-antimonide film. The film used was prepared by the step-by-step method of evaporation in a vacuum, producing successive deposits on a clean glass substrate. The electrical characteristics of the film were measured in a steady magnetic field and showed some unusual features such as high resistivity, a relatively large Hall coefficient dependent on the applied magnetic field and a negative magnetoresistance effect at room temperature. These anomalous effects have been analysed qualitatively in terms of the inhomogeneous nature of the film.