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Fermentation is one of the technologies in biotechnology to produce biotech products that are rich in nutritional content and have better quality. Survey data shows that students responding to biotechnology courses are one of the subjects that are difficult to understand and difficult to practice. Therefore, researchers tried to analyze the misconceptions that occured in students who had studied biotechnology courses on the concepts of fermentation technology and fermentation products. The research approach is qualitative with the research method used is decriptive. The study population was students of Biology Education STKIP Persada Khatulistiwa Sintang and the samples used were 36 students who has studied biotechnology. The technique of collecting data with diagnostic tests in the form of multiple choices and interviews. Analyze data using Certainty Of Response Index (CRI) and descriptive. The results of the research obtained are misconceptions on the concept of 34.44% fermentation technology and the concept of fermentation products by 34%. From these data it is known that quite a number of Biology Education students experience misconceptions.