Hydrogen sulfide was decomposed to elemental sulfur in an electrical discharge. With he, n2, or ar diluents, a threshold voltage between 1 and 3 kv was required for the decomposition reaction to occur in a laboratory ozonizer. Above the threshold voltage, the h2s decomposition rate increased with increasing voltage, but the increase was more pronounced with argon diluent than with either nitrogen or helium. In common with other reactions in an electrical discharge, the h2s decomposition decreased with increasing temperature in the range of -41 deg to +61 deg c. The reaction did not appear to be rate controlled by a solid-gas sorption step because the introduction of activated charcoal into the electrical discharge zone did not significantly affect the decomposition yield. In the presence of polymeric chlorofluorcarbon oil, 90 percent conversion of the 3-percent h2s in helium was obtained at 14 kv, 60 hz, a 2-mm electrode gap, and a gas-residence time greater than 1 min. Under the same experimental conditions in the absence of oil, the conversion was only about 50 percent.