We have calculated the mobility of InxGa1-xN alloy by the iterative method interval x = 0 - 1 in low field. We have investigated x mole fraction dependence of calculated mobility. The Boltzmann transport equation involved in relevant scattering mechanisms has been solved. These scattering mechanisms are polar optic phonon scattering, ionized impurity scattering, acoustic phonon deformation potential scattering, acoustic phonon piezoelectric scattering and alloy scattering. Vegard's law was used for the lattice constants of these compounds. Furthermore, Phillip's electronegative difference theorem and the values of alloy potential in Ref.  were used to calculate the alloy scattering potential for alloy scattering and for comparison. (c) 2005 Elsevier Ltd. All rights reserved.