Automatic analysis apparatus

An automatic analysis apparatus comprising:

• a reaction container moving mechanism including a reaction vessel configured to hold water and a plurality of reaction containers for containing a specimen and a reagent arranged in the reaction container moving mechanism and which are immersed in the water in the reaction vessel, and the reaction container moving mechanism is configured to move the reaction containers thereon;
• a light source lamp configured to irradiate a reaction container among the plurality of reaction containers arranged in the reaction vessel of the reaction container moving mechanism with light;
• a photometer configured to measure the light emitted from the light source lamp and passed through the reaction container;
• a discharge mechanism configured to discharge the water in the reaction vessel;
• a water supply mechanism configured to supply water into the reaction vessel;
• a reaction vessel water level detector including a first water level detector configured to detect that a water level of the water in the reaction vessel is a full water level and a second water level detector configured to detect that the water level of the water in the reaction vessel is a measurement limit water level which is lower than the full water level and higher than a position of an optical axis of the light emitted from the light source lamp;
• and
• a control unit connected to the reaction container moving mechanism, the light source lamp, the photometer, the discharge mechanism, and the water supply mechanism, the control unit programmed to control operations of the reaction container moving mechanism, the light source lamp, and the photometer to analyze the specimen in the reaction container, and programmed to control operations of the discharge mechanism and the water supply mechanism based on the water level of the reaction vessel water detected by the reaction vessel water level detector.