Six NiMo catalysts supported on various C substrates were prepd. by the impregnation method. The catalytic activity of the resulting systems was tested in hydrodesulfurization of thiophene at 260-400 degrees C and 1 atm. Active C supports were characterized by N-2 sorption, Hg porosimetry and temp.-programmed desorption. Activity of the catalysts depended strongly on the properties of the C support. Some of the bimetallic NiMo/C catalysts were more efficient than the com. one.