Automatic analyzer having cuvette cleaning control device

An automatic analyzer, comprising:

• a turntable holding a plurality of reaction vessels;
• means for driving the turntable so that cleaning, blank measurement, sample addition, reagent addition, and optical sample measurement are performed with respect to the plurality of reaction vessels when the plurality of reaction vessels are located at positions corresponding to the cleaning, the blank measurement, the sample addition, the reagent addition, and the optical sample measurement;
• means for judging in advance of the sample addition whether any of said plurality of reaction vessels which are located between the cleaning position and the sample addition position should be cleaned when the analyzer starts to operate so as to perform the cleaning with respect to at least one of the reaction vessels located between the cleaning position and the sample addition position which should be cleaned, and so as to prevent the remainder thereof from being cleaned to start the blank measurement from the remainder prevented from being cleaned;
• and
• means for storing correspondences between the plurality of reaction vessels and vessel positions at which the plurality of reaction vessels are held by the turntable, the correspondences being those after the turntable finishes operating;
• wherein the judging means judges whether the reaction vessels which are located between the cleaning position and the sample addition position should be cleaned or not based on the stored correspondences.