provided is an apparatus for detecting biopolymers capable of total analysis including non - reacted samples without complicated operations such as washing . a dna probe is fixed to one of electrodes and direct current voltage is placed between the electrodes , so that it becomes possible to separate complementary strand sample dna and non - complementary strand sample dna . by analyzing from a ratio in the whole reaction system , it is possible to obtain clearer results . further , by using electrophoresis by gel together , it is possible to separate reacted samples and non - reacted samples to perform measurements therefor in the same reaction field .