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The distribution of natural radionuclide γ-ray activities and their respective annual effective dose rates, produced by 40K, 238U, 226Ra, 235U and 232Th, were determined for granite samples collected along the road of Idfu-Marsa Alam in eastern desert of Egypt. This subject is important in environmental radiological protection, since granites are widely used as building material. The variation in concentration of radionuclides for thirty granite samples was determined. A HPGe spectrometer was used for quantification of gamma emitting radionuclides in the sediments. All sediments contained radionuclides from the uranium and thorium series as well as