This paper aims to investigate the dynamic mechanical properties of Polycarbonate material processed by Fused Deposition Modeling (FDM) rapid prototyping process. Frequency sweep is performed in Dynamic Mechanical Analysis (DMA) 2980 equipment to get modulus, damping and viscosity values. The effects of FDM parameters (built style, raster width, and raster angle) over these properties are presented. Frequency sweep experiment is done with the range of 10 Hz to 100 Hz in three different isothermal temperatures. It is found that solid normal built style gives more modulus and viscosity values than the other built styles.