An automatic analyzer comprising: a reagent container holding unit (10; 17) that holds a plurality of reagent containers (15; 22) for accommodating reagents; a dispensing mechanism (12, 13; 19, 20) that dispenses a reagent and a sample into a reaction vessel (42; 45); a measurement unit (43, 44; 23) that measures characteristics of a reaction solution between the reagent and the sample accommodated in the reaction vessel; an auto-loader (11; 18) that stores the reagent container in the reagent container holding unit and discharges the reagent container held in the reagent container holding unit from the reagent container holding unit; a display unit; and a control unit that stores holding position information of the plurality of reagent containers held in the reagent container holding unit and management information of the reagents accommodated in the plurality of reagent containers, and causes the display unit to display the holding position information and the management information, wherein the control unit causes the display unit to display, corresponding to holding positions of the plurality of reagent containers held in the reagent container holding unit, a first screen on which a plurality of reagent management item displaying areas (28; 39) for displaying the holding position information and, as the management information, a remaining amount, an analysis item name and reagent state information of each of the reagents accommodated in the plurality of reagent containers are arranged in a matrix form and a discharge-scheduled reagent displaying area that displays display areas corresponding to the number of reagent containers stored in the auto-loader is arranged, each of the display areas displaying a reagent scheduled to be discharged from the reagent container holding unit by the auto-loader; the plurality of reagent management item displaying areas of the first screen have button functions for switching a display screen, respectively, and a second screen for displaying detailed information on a reagent of the selected reagent management item displaying area is switched and displayed from the first screen by the button function of the selected reagent management item displaying area out of the plurality of reagent management item displaying areas; and the second screen further displays information of a reagent to be used in combination with the reagent in the selected reagent management item displaying area, according to the button function of the first screen. a reagent container holding unit (10; 17) that holds a plurality of reagent containers (15; 22) for accommodating reagents; a dispensing mechanism (12, 13; 19, 20) that dispenses a reagent and a sample into a reaction vessel (42; 45); a measurement unit (43, 44; 23) that measures characteristics of a reaction solution between the reagent and the sample accommodated in the reaction vessel; an auto-loader (11; 18) that stores the reagent container in the reagent container holding unit and discharges the reagent container held in the reagent container holding unit from the reagent container holding unit; a display unit; and a control unit that stores holding position information of the plurality of reagent containers held in the reagent container holding unit and management information of the reagents accommodated in the plurality of reagent containers, and causes the display unit to display the holding position information and the management information, wherein the control unit causes the display unit to display, corresponding to holding positions of the plurality of reagent containers held in the reagent container holding unit, a first screen on which a plurality of reagent management item displaying areas (28; 39) for displaying the holding position information and, as the management information, a remaining amount, an analysis item name and reagent state information of each of the reagents accommodated in the plurality of reagent containers are arranged in a matrix form and a discharge-scheduled reagent displaying area that displays display areas corresponding to the number of reagent containers stored in the auto-loader is arranged, each of the display areas displaying a reagent scheduled to be discharged from the reagent container holding unit by the auto-loader; a plurality of reagent management item displaying areas (28; 39) for displaying the holding position information and, as the management information, a remaining amount, an analysis item name and reagent state information of each of the reagents accommodated in the plurality of reagent containers are arranged in a matrix form and a discharge-scheduled reagent displaying area that displays display areas corresponding to the number of reagent containers stored in the auto-loader is arranged, each of the display areas displaying a reagent scheduled to be discharged from the reagent container holding unit by the auto-loader; the plurality of reagent management item displaying areas of the first screen have button functions for switching a display screen, respectively, and a second screen for displaying detailed information on a reagent of the selected reagent management item displaying area is switched and displayed from the first screen by the button function of the selected reagent management item displaying area out of the plurality of reagent management item displaying areas; and the second screen further displays information of a reagent to be used in combination with the reagent in the selected reagent management item displaying area, according to the button function of the first screen.