Bitumen which is used as a binder in hot mix asphalt (HMA) has a viscoelastic behavior. For this reason, highway pavements have to be produced at very high temperatures such as 160 ºC-180 ºC. These high temperatures cause dangerous operating conditions. Using warm mix asphalt (WMA) technologies, it is possible to reduce the production temperature of asphalt. WMA technologies are very useful from an environmental and economic perspective. The WMA asphalt technologies can be classified in the following four groups: foam asphalt technologies, organic additives, chemical additives, zeolites. The aim of all this additives is to reduce asphalt viscosity at low temperatures. Thus, it can be possible to improve asphalt workability, create good working conditions for road pavement industry and reduce air pollution. In this study, the effects of natural zeolites on a WMA were examined in terms of moisture susceptibility. The experimental tests performed in the study were conventional bitumen tests, aggregate tests, determination of optimum bitumen ratio and water sensitivity test. Based on the results of these tests, it can be noted that optimum usage of the natural zeolite in warm mix asphalt was determined as in the amount of 6% at 120 ºC.