New catalyst, particularly suitable for dehydrogenating saturated hydrocarbons, which contains alumina, at least one metal selected from molybdenum, tungsten and rhenium and at least one metal selected from gallium, indium, thallium, germanium, tin, lead, antimony and bismuth, said catalyst having a specific surface from 20 to 150 m2/g and a neutralization heat by ammonia adsorption at 320*C under 300 mm Hg lower than 10 calories per gram.