Natural fiber reinforced polymer matrix composites have found increasing attention from thernrecent decades because of its high strength to weight ratio, environmental friendliness, etc. Pastrnstudies show that synthetic and natural fiber such as glass, carbon, jute, hemp, banana etc., havernbeen used in fiber reinforced polymer matrix composite. In this paper work, sisal fiber is used asrnreinforcement and an investigation has been carried out to make use of sisal fiber made epoxyrnresin matrix composite. Therefore, this work intends to study the fracture toughness analysis ofrnchopped sisal fiber reinforced polymer matrix composite using finite element methods in termsrnof the linear elastic fracture mechanics, this includes the early investigations and recent advancesrnof fracture toughness test methods which include the most important fracture mechanicsrnparameters the so called stress intensity factor K.rnThe sisal fiber were extracted from Ethiopian highland sisal plant by retting and combing processrnmanually and after extraction 10% sodium hydroxide was used for further surface treatment forrnthe improvement of bond & interfacial shear strength of the sisal fiber. The fracture toughnessrntest of chopped sisal fiber reinforced epoxy composite material were carried out using testrnsamples which is prepared According to the ASTM standard. The specimen has been fabricatedrnby using the epoxy resin (AY-105) as a matrix and the hardener (HY-905) and the chopped sisalrnfiber as a reinforcement material with the 15%,25%, 30%, 35% and 40% fiber weight fraction,rnrandom oriented chopped fibers by using hand layup fabrication technique.rnThe 30 wt% chopped SFREC was found the high stress intensity factor and this result alsorncompared and validated using FEM analysis and the error from the experiment is measures up torn1.08% for stress intensity factor and 2.286% for strain release rate. This signifies the validity ofrnthe experiment.rnFurthermore, both results justify that the 30/70 composition of chopped sisal fiber and epoxyrnresin matrix has robust fracture characteristics with KIC of 5.48 MPa.m1/2 and critical strainrnenergy release rate (GIC) of 13.72 MPa.mm and results of this study indicate that using choppedrnsisal fibers as reinforcement in polymer matrix could successfully develop a composite materialrnin terms of high strength and rigidity for light weight material.rnKey words: sisal fiber, epoxy, composite, hand layup, stress intensity factor (KIC), strain energyrnrelease rate (GIC), FEM