In this work, electron doping of the anisotropic phase Ca 4Mn3O10 was achieved by substitution of manganese by vanadium. No significant structural modifications were detected to the highest substitution ratio of 10% achieved. The introduction of vanadium decreases the electrical resistivity, described as two-dimensional variable range hopping, and induces the appearance of a ferromagnetic behavior. Consistently negative magnetoresistance develops in the magnetic ordered state. These results are characteristic of the presence of double exchange interactions, indicating that vanadium doping induces mixed valence of manganese.