This article concentrates on evaluating engineering properties of natural fiber concrete (NFC) incorporating straw grass (SG) – a type of grass harvested in Vietnam as short discrete fibers. Three percentages of SG fibers (0.2%, 0.4%, and 0.6% by volume) were added to the NFC mixtures to obtain a fair bit of knowledge about this new material on the behaviors of concrete. In combination with waste materials from industrial activities like fly ash and slag and the use of superplasticizer (SP), four NFC mixtures were created and elucidated on attributes of NFC at both fresh and hardened stages to have a general understanding. The test results demonstrate that SG fibers were regarded as a potential source of natural fibers since they increased the compressive and flexural strengths remarkably. Specifically, the addition of 0.6% SG fibers boosted the compressive strength up to 10% higher than that of the SG-free mixture while this increment of flexural strength was recorded over 20%. Also, the water absorption values ranged from 3.4% to 4.7% for all NFC samples. Thus, the water absorption rate decreased by approximately 0.5% for the incorporation of a small fraction of SG fibers (0.4%).