Durian (Durio Ziberthinus Murr) is a commodity fruit in Southeast Asia especially in Malaysia, Thailand and Indonesia. Durian skin contains lignin, cellulose, and hemicellulose and is the potential to be converted into several solid, liquid, and gas products by a slow pyrolysis process. This work strived to observe the effect of residence time and temperature on pyrolysis-gas product composition. Durian skin (DS) in size 4-5 cm was pyrolyzed in a fixed bed pyrolysis reactor with natural zeolite inside at the temperature range of 300 °C - 400 °C for 10 min and 30 min. The yield of pyrolysis gas products and gas product components was determined in this work. The pyrolysis gas product was analyzed using Gas Chromatography (GC) to determine the components of gas such as CO, CH4 and H2 along with CO2 gas. The best performance was achieved at 300 °C for 30 min residence time with gas products 29.8 ng/ul CO2, 30.89 ng/ul CO, 13.08 ng/ul CH4 and 8.17 ng/ul H2. The characteristics of the zeolite used were analyzed by X-ray Diffraction (XRD) to determine the effect of activation and pyrolysis product on the catalyst crystal transformation.