There are many studies focusing on indoor air quality in primary and secondary schools. Nevertheless, studies in nursery schools are still few. Concentrations of indoor air pollutants are typically 2-5 times higher, and occasionally 100 times higher than outdoors. Children spend more time in nursery and preschools than in any other indoor microenvironment besides home. It is generally assumed that preschool students are more susceptible to the adverse effects of poor indoor air quality (IAQ) than elementary or middle school students due to their activities. The parameters of indoor air quality in nursery school during the period as introducing case study is measured. The assessment is based on the measurement of indoor air temperature, relative humidity (RH), and Carbon Dioxide (CO2) and total volatile organic compounds (TVOC) concentration. Likewise, individual VOC concentrations are also monitored. The air temperature and relative humidity are set with data logger Testo 480. An ultra-fast electronic nose based on gas chromatography is used for the analysis of individual VOCs and a photoionization detector with a UV lamp was used for the determination of total volatile organic compounds (TVOC) concentration.