a process for producing a denitration catalyst suitable for catalytically reducing nitrogen oxides in exhaust gases having a low dust content with ammonia is provided , which process comprises adding water to catalyst raw materials affording titanium oxide , molybdenum oxide and vanadium oxide at the time of calcination respective proportions thereof being in the range of ti / mo / v = 97 - 65 / 3 - 20 / 0 - 15 atomic %, to make slurry , followed by coating the slurry onto a metal substrate and drying . molybdenum oxide particles are coated on a titanium oxide particle at calcination , which makes the grindability of the catalyst particle easy and improve its adherence to the metal substrate .