Measuring device equipped with large surface detectors, for automatic determination of radioactive contamination by gamma-emitting nuclides on limbs and clothes. GAMMAMEP4 consists of 4 large surface detectors (20 x 12 cm), one for each feet and one for each hand. The detectors dedicated to hands are removable for the measure of the contamination over the whole body. GAMMAMEP4 is supplied with PC and software for data organization and storage.