An electrochemical measurement device comprising a flow cell for electrochemical measurement, which is adapted to introduce a sample solution, apply a voltage between a working electrode and a counter electrode to analyze the sample solution electrochemically, discharge the sample solution, and perform the electrochemical measurement continuously while the flow cell makes a measurement by repetitively performing a cycle including an electrochemical measurement step and a cleaning step, characterised in that said cycle includes, further to said electrochemical measurement and cleaning steps, a conditioning step, and the electrochemical measurement device comprises: a control device including: (i) a current measurement unit arranged for measuring, in the conditioning step, the cleaning step or the electrochemical measurement step, a value of a current flowing between the electrodes at the time of applying a voltage; (ii) a storage unit arranged for recording the measured current value; and (iii) a comparison unit arranged for comparing a current value measured in the conditioning step or in the cleaning step of a determination target cycle, with a determination standard based on a current value obtained in the conditioning or cleaning step from a plurality of cycles including a cycle that occurred immediately before the determination target cycle and stored in the storage unit; a determination unit arranged for determining whether the current value measured at the determination target cycle is normal, by use of the comparison unit; and a communication device arranged for communicating, when it is determined that the measured current value is not normal, abnormality of the current value to an operator. a control device including: (i) a current measurement unit arranged for measuring, in the conditioning step, the cleaning step or the electrochemical measurement step, a value of a current flowing between the electrodes at the time of applying a voltage; (ii) a storage unit arranged for recording the measured current value; and (iii) a comparison unit arranged for comparing a current value measured in the conditioning step or in the cleaning step of a determination target cycle, with a determination standard based on a current value obtained in the conditioning or cleaning step from a plurality of cycles including a cycle that occurred immediately before the determination target cycle and stored in the storage unit; (i) a current measurement unit arranged for measuring, in the conditioning step, the cleaning step or the electrochemical measurement step, a value of a current flowing between the electrodes at the time of applying a voltage; (ii) a storage unit arranged for recording the measured current value; and (iii) a comparison unit arranged for comparing a current value measured in the conditioning step or in the cleaning step of a determination target cycle, with a determination standard based on a current value obtained in the conditioning or cleaning step from a plurality of cycles including a cycle that occurred immediately before the determination target cycle and stored in the storage unit; a determination unit arranged for determining whether the current value measured at the determination target cycle is normal, by use of the comparison unit; and a communication device arranged for communicating, when it is determined that the measured current value is not normal, abnormality of the current value to an operator. <EOS>