Quenching effects of acetylene and hydrogen into oxygen detonation by using detonation arrester [DA] are studied in this paper. The experiments were carried out in cylinderical shock tube, 5m long, 30㎜ dia., with storchiometric ratio [SR] of each gas and 10-120μCell Size of brass and Stainless Steel of DAs were installed in it. To clarify arresting ability correlation with initial pressure, Pi, critical thickness, Tct, and shapes of supporting panel of DA are also investigated. It is found that -detonation velocities has most dependency on Pi, it shows notable changes around 0.5Kgf/㎠ for hydrogen. 0.5Kgf/㎠ for acetylen respectively, -DA can be safety device able to arrest shock wave of detonation, -over Tct flame transmission might be only the factor has to be considered, -acetylene seems to be much more stronger detonation characteristircs than hydrogen because of reaction heat.