An investigation on the structures of the metal-metalloid glassy alloys Pd77Si16.5Ag6.59,Co42.9Ni27.3Fe7.8Si8B14 and Co50.7Ni19.5Fe7.8Si6B16 was carried out by means of X-ray diffraction method. The informations about the structure of these glassy metals such as the average atomic distance, the nearest coordination number and the radius of short range order were obtained from the radial distribution functions RDF(r). Besides, the Gaussian distribution formula were used to fit the first peak of RDF(r), and the best expression was found. The coordination number of metal-metal atoms was estimated approximately.