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Benjarong porcelain is a unique Thai pottery. It represents the art and culture of Thailand for hundreds of years. The decorating pattern uses various colors, including metal oxide, glue and gold paint. In the firing process, chemical emissions are produced from the kiln, which have not been studied before. From the literature review, the potential pollutants comprise hydrogen cyanide, formaldehyde, metal fumes and flue gases. This study assessed the type and concentration of chemicals emitted from Benjarong decoration firing kiln. One voluntary Benjarong enterprise, using regular decoration firing, was selected as the study site. Air samples were collected and analyzed for hydrogen cyanide, formaldehyde, heavy metals, i.e., lead (Pb), nickel (Ni) and cadmium (Cd) and flue gases inside, beside and behind the kiln storage room, respectively. The result showed that all chemical concentrations were lower than the Occupational Exposure Limit (OEL) of the U.S.OSHA standard. However, the maximum concentration of Pb was quite close to the OEL standard value at 0.044 mg/m3 showing that the greatest health risk in Benjarong production is Pb exposure.