Despite many advantages, poor mechanical properties are a limiting factor in market growth of natural fiber composites. This work is focused on improvement in the mechanical properties of hemp/green epoxy composites by using four different weave structures and by adding glass microspheres (GMS) to the resin. The reinforcement was fabricated in four different weave designs (matt, satin, hybrid weave A, and hybrid weave B) and four different percentages of GMS (0%, 2%, 3.5%, and 5% on the weight of resin) were also mixed in the green epoxy resin. Four layered composites were fabricated by using vacuum bagging technique. The tensile, flexural and impact tests were conducted. The results showed that the tensile strength of composites with satin weave reinforcement is better than other weaves, due to longer warp thread float and lesser number of intersection points. While, during flexural and pendulum (Charpy) impact testing, matt weave composite showed better results due to its stable and robust structure as compared to the other weave composites. Keeping the weave design constant, the composites with 5% GSM showed better tensile, flexural and impact behavior. Both factors (weave design and GMS percentage) showed a statistically significant effect on the mechanical test results. K E Y W O R D S glass microspheres, green epoxy, mechanical properties, natural fiber reinforced composites, weave structure 1 | INTRODUCTION Natural fiber reinforced polymer matrix composites are gaining more and more share in market due to their light weight, good values of stiffness and specific strength, and ecofriendly nature. These are mostly used in build tech, sport tech, automotive industry, and aerospace industry. [1-3] Textile based reinforcement is commonly available in the form of a bunch of fibers or fabric and carries the applied stress to composite and is responsible for the mechanical strength of composite. Type of fiber, geometry, and physical orientation of the fibers/yarns in the reinforcement are the key factors in their mechanical performance. Textile reinforcements may be woven, knitted, braided, unidirectional, and nonwoven and their choice are made depending upon their area of application, [4] also waste fibers are used in different woven composites. [5] Woven reinforcement is most widely used in the high performance area due to its structural integrity and availability of a wide range of design