PM, SO2, NO2 and CO emissions were measured by Turkish Cement Manufacturers' Association (TCMA) in cement plants by using standard techniques and equipment since 1997. Emission factors (EF) were calculated by using these available data for the cement sector. The emission factors were found both for cement and grinding-packing plants separately. The results of the study were compared with international emission factors. It was observed that Turkish Cement Sector's particulate matter emission factors are higher and SO2 emission factors are lower than the values determined for U.S.A., German, Austrian and Dutch cement sectors. When NO2 and CO emission factors are considered, they are between minimum and maximum values of international emission factors. The results showed that there is a decrease in dust emissions of Turkish cement plants, especially in the last three years during the period of regular measurements. Also, it was found that more than 90% of air pollution is emitted from primary sources of each plant which are few in number.