An automatic analyzer comprising: a liquid dispensing mechanism configured to suck a sample or a reagent that is a liquid contained in a container ; a pressure sensor configured to measure a change of a pressure in a probe provided at the liquid dispensing mechanism ; a determination section configured to determine whether suction by the probe is liquid suction that is normal suction or air suction that is abnormal suction on the basis of the change of the pressure measured by the pressure sensor ; an analysis section configured to analyse the sample; a storage section ; and a controller that controls the liquid dispensing mechanism , the determination section , and the analysis section to operate, characterized in that the storage section stores a cumulative number of air suction abnormalities per liquid determined by the determination section and an allowable cumulative number for the number of the air suction abnormalities, the allowable cumulative number being equal to or greater than 2, and the controller updates the cumulative number of the air suction abnormalities and stores the updated cumulative number in the storage section even if the air suction abnormalities are not consecutive in a course of a suction operation of the liquid by the probe with respect to a number of measurement items for the same liquid, causes the suction operation planned on the liquid to be continued until the updated cumulative number reaches the allowable cumulative number, and cancels requests of the measurement items planned for the liquid and causes the suction operation to be performed on another liquid planned next when the updated cumulative number reaches the allowable cumulative number. a liquid dispensing mechanism configured to suck a sample or a reagent that is a liquid contained in a container ; a pressure sensor configured to measure a change of a pressure in a probe provided at the liquid dispensing mechanism ; a determination section configured to determine whether suction by the probe is liquid suction that is normal suction or air suction that is abnormal suction on the basis of the change of the pressure measured by the pressure sensor ; an analysis section configured to analyse the sample; a storage section ; and a controller that controls the liquid dispensing mechanism , the determination section , and the analysis section to operate, characterized in that the storage section stores a cumulative number of air suction abnormalities per liquid determined by the determination section and an allowable cumulative number for the number of the air suction abnormalities, the allowable cumulative number being equal to or greater than 2, and the controller updates the cumulative number of the air suction abnormalities and stores the updated cumulative number in the storage section even if the air suction abnormalities are not consecutive in a course of a suction operation of the liquid by the probe with respect to a number of measurement items for the same liquid, causes the suction operation planned on the liquid to be continued until the updated cumulative number reaches the allowable cumulative number, and cancels requests of the measurement items planned for the liquid and causes the suction operation to be performed on another liquid planned next when the updated cumulative number reaches the allowable cumulative number. <EOS>