Abstract Natural fibers with environmental economic and cost advantages are highly sought-after for biocomposite materials. In the present study the biocomposite samples of epoxy resin (as a matrix) bagasse fiber (as reinforcement) and rice bran (as a filler) were prepared. Tensile strength strain and Young s modulus will be the parameters concerning which the quality of the biocomposite can be tested. On the one hand bagasse fiber is to be a strength enhancer in the resulting biocomposite. On the other hand rice bran may increase the biocomposite s density. The process research comprises fiber yarn from milled bagasse alkalized fiber with KMnO4 specimen printing process and analysis. All the fibers were treated by soaking them in 3 grams of KMnO4 solution for 30 and 45 minutes. The fiber is drained in an oven at 50 deg C for plusmn 1.5 hours. The printed fiber onto a specimen mold was printed with a mixture of epoxy resin and rice bran (1 1 w/w) and left for one day. Variation in the fiber mass was at 3 4 and 5 grams. The sizes of the specimens were similar to the size of the mold according to ASTM D-638 type IV. Then the fibers were removed from the mold and tested for tensile strength strain and Young s modulus. The results show that the greater the fiber mass the greater the tensile strength value. These findings indicate that the tensile strength was optimized after soaking for 45 minutes with 5-gram fiber weight which resulted in the tensile strength of 26.32 plusmn 0.25 MPa strain of 9.65 plusmn 0.14% Young s Modulus of 3.29 plusmn 0.05 MPa and water absorption of 41.99%. Keywords Biocomposite bagasse KMNO4 and tensile strength