Fe-P amorphous ribbons were prepared by melt quenching, and the concentration and temperature dependences of electrical resistivity, magnetoresistance, and forced magnetoresistivity have been investigated. The room temperature electrical resistivity monotonically increases with P content. The Debye temperature determined from the temperature dependence of electrical resistivity of Fe-P amorphous alloys is lower than that of Fe-B amorphous alloys. The concentration and temperature dependences of the anisotropic magnetoresistance are not associated with the magnetization or the linear magnetostriction at low P contents. The magnitude of the negative forced magnetoresistivity becomes larger with increasing P content and temperature.