An apparatus of reading identification information according to a code attached on a biosensor. In reading the identification information through a pattern of the existing biosensor, a photodetector and a light resource are required for each segment so as to read segments of each pattern. However, such a system may cause a complexity of circuit-driving, raise manufacturing costs, and prolong operating hours. Thus, to solve these problems, provided is a technology, which, in contrast to the existing technology, has advantages of using a small amount of electronic components and reduced driving circuits to shorten working hours, and the like.