Abstract : The threat of plastic waste is very dangerous due to the increasingly widespread use of plastic and the uncontrolled disposal of plastic waste. Almost everywhere there is a pile of plastic waste that has no processing or recycling. If left unchecked, this can result in various pollutions to the environment and living things. One way to reduce the use of plastic is by developing bioplastic materials, namely biodegradable plastic materials which are certainly more environmentally friendly. In this study, bioplastics were made from a mixture of tapioca starch and corn starch reinforced with chitosan. Bioplastics are made with various weight percentages, tapioca starch and corn starch 70:30, 60:40, and 50:50 and how they affect the fire resistance properties. Based on the test results, the highest combustion rate and the highest weight loss occurred in bioplastics with a weight fraction ratio of 50:50, namely a mixture of tapioca starch and corn starch with balanced proportions, which was 8.4208 mm/second and 0.0346 gr/second, while the lowest combustion rate and the lowest rate of weight loss occurred in bioplastics with a weight fraction ratio of 70:30, namely the tapioca starch mixture was larger than corn starch with a proportion of 70:30, 6.0857 mm/second, and 0.0306 gr/second.