Longitudinal and transverse magnetoresistances have been measured in single‐crystalp‐type PbTe of hole concentrationp=1.3×1019cm−3at 4.2 K up to a magnetic field of 68 kG. These magnetoresistances vary linearly with magnetic field. The effective mass anisotropyKof the crystal has been estimated from the magnetoresistance measurements in the classical field region, using the theory of Gold and Roth. The value ofKis 3.5.