This paper investigated the volumetric and mechanical properties using Marshall design method for fiber - reinforced asphalt mixtures. Two different fibers were used: cellulose and glass fibers with content is 0,3 percent and 0,5 percent by mass of asphalt mixture. Preliminary results show that the optimum asphalt content, void in mineral aggregate, air void, Marshall stability and flow value increase, while bulk specific gravity decrease with increasing fiber content. They also show that,' Marshall Stability of glass-fiber mix is higher than celllulose-fiber mix due to networking effect, while optimum asphalt content of celllulose-fiber mix is higher resulting from asphalt absorption of celllulose. Base on the first testing result, it would be confirmed the feasibility of the evaluation and design of fiber-reinfoced asphalt mixture in Viet Nam's condition laboratory.