The present invention refers to a process for oligomerization of acetylene in the presence catalyst comprising the step of reacting acetylene and hydrogen in an inert gas in a gas phase reactor in thepresence of a copper-containing support selected from molecular sieves, amorphous aluminosilicates, zeolites, clays, metal oxides, metal phosphates, cation exchange materials at a temperature in therange 20 to 700 DEG C and at a reaction pressure of up to 35 bar.