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A relation between new houses' high VOCs concentration with SBS and asthma has been a social issue in Korea now. However, people who are exposed to high concentration of chemical compounds from construction materials as well as occupants of new houses are the workers for construction business. Self reported symptom surveys and personal exposure concentration measurement research were conducted to three job groups of construction business such as Exterior Worker, Interior Worker, and Office Worker. As a result, the job group which is most highly exposed to taking VOCs concentration is Interior Worker followed by Office Worker and Exterior Worker. However, in self-reported symptoms suggestive of MCS, office worker are relatively frequent in three job groups. According to this result, the continuous exposure in high concentration must be prevented by the measures for Interior Worker also to be bestowed a compulsory break during working hour for regular exposure to the open air.