Syntactic foams are one of the composite materials that their main characteristic is to use microscale hollow particles called microballoon. Microballoons change some of the material properties via lowering the weight, increasing the compressive strength, and augmenting thermal insulation effect. The syntactic foams provide suitable conditions to improve the properties of the composite material. In addition, the manufacturing cost decreases due to fabrication simplicity in comparison with other materials. The aim of the present research is to design an optimum procedure in order to fabricate a syntactic foam specimen in a way that the voids inside of the specimens be as low as possible. After finding a proper technique in fabrication procedure, the obtained results, including stress-strain charts and SEM images, showed that voids in specimens were minimized and the microballoon distribution in the final product was uniform. In addition, the results obtained from numerical analysis, including the foam tensile and compressive modulus, had a good agreement with the results of the experimental tests. Furthermore, it was observed that increasing the weight percentage of microballoons led to an increase in energy absorption during the compression test. Also, both tensile and compressive modulus were increased in comparison with the original material. However, the material strength in compression tests remained almost constant while it was decreased in tensile tests. Keywords: Syntactic foam, microballoon, composite materials, hollow particle, numerical analysis, tensile and compression test