AUTOMATED ANALYZING DEVICE

Provided is an automatic analyzer that detects an abnormality of an electrode constituting a stirring mechanism with high accuracy and suppresses decline in processing capability. The automatic analyzer comprises: a sample dispensing mechanism that dispenses a sample into a reaction container; a reagent dispensing mechanism that dispenses a reagent into the reaction container; a stirring mechanism that has an electrode; a reaction disk that rotates and stops the reaction container; and a control unit that, when the reaction container containing a mixture of the sample and the reagent is stopped at a stirring position, applies a voltage to the electrode and irradiates the mixture with ultrasonic waves. The control unit applies a voltage to the electrode and measures an electric impedance when, during operation, the reaction container into which a liquid has been dispensed by the reagent dispensing mechanism in an empty state is stopped at the stirring position.