An automatic analyzer for analyzing constituents of a sample, the automatic analyzer comprising: an analyzing unit including analysis equipment including reaction means, pipetting means (117, 124), and measurement means; an operation unit including a storage unit, an input unit, and an output unit for outputting results of analyses of analysis items requested for samples as analysis process data; and a control unit for controlling the storage unit to store information about operation performed by the analysis equipment in analysis and inspection processes, information about a condition when maintenance is performed for the automatic analyzer, information about a process of how expendable supplies such as reagent provided for the analysis and inspection processes are used, and information about analysis and inspection performed to derive a calibration curve used for calibration of analysis and inspection; characterized in that the control unit is adapted to control the output unit to display for each analysis or inspection process on a corresponding sample and a corresponding analysis item, the analysis process data, additional data, the analysis equipment operation information, the maintenance condition information and the expendable supplies information in a time-series manner, and at the same time, the analysis or inspection in the order of the samples subjected to the analysis or inspection processes and in the order of the analysis items of the analysis or inspection processes; wherein the control unit is adapted to generate the additional data from the analysis process data according to a generation rule based on logical estimation and to control the storage unit to store the additional information. an analyzing unit including analysis equipment including reaction means, pipetting means (117, 124), and measurement means; an operation unit including a storage unit, an input unit, and an output unit for outputting results of analyses of analysis items requested for samples as analysis process data; and a control unit for controlling the storage unit to store information about operation performed by the analysis equipment in analysis and inspection processes, information about a condition when maintenance is performed for the automatic analyzer, information about a process of how expendable supplies such as reagent provided for the analysis and inspection processes are used, and information about analysis and inspection performed to derive a calibration curve used for calibration of analysis and inspection; information about operation performed by the analysis equipment in analysis and inspection processes, information about a condition when maintenance is performed for the automatic analyzer, information about a process of how expendable supplies such as reagent provided for the analysis and inspection processes are used, and information about analysis and inspection performed to derive a calibration curve used for calibration of analysis and inspection; characterized in that the control unit is adapted to control the output unit to display for each analysis or inspection process on a corresponding sample and a corresponding analysis item, the analysis process data, additional data, the analysis equipment operation information, the maintenance condition information and the expendable supplies information in a time-series manner, and at the same time, the analysis or inspection in the order of the samples subjected to the analysis or inspection processes and in the order of the analysis items of the analysis or inspection processes; for each analysis or inspection process on a corresponding sample and a corresponding analysis item, the analysis process data, additional data, the analysis equipment operation information, the maintenance condition information and the expendable supplies information in a time-series manner, and at the same time, the analysis or inspection in the order of the samples subjected to the analysis or inspection processes and in the order of the analysis items of the analysis or inspection processes; wherein the control unit is adapted to generate the additional data from the analysis process data according to a generation rule based on logical estimation and to control the storage unit to store the additional information.