An automatic analyzer comprising: a sample storage section for accommodating a plurality of samples; a reagent storage section for accommodating a plurality of reagents; an analysis section for carrying out an analysis by reacting the sample with the reagent in an inspection started on instruction by an operator; a display; a power switch which can be pressed for power shutdown of the automatic analyzer at the end of inspection as well as during inspection; a storage section for storing a setting of an operation item to be automatically executed, the setting relating to execution or non-execution of the operation item and being effective only at restart of the automatic analyzer after power shutdown during inspection; and a control section configured, upon pressing of the power switch by an operator during the inspection: to display on said display a screen for the setting of the operation item to be automatically executed, the setting relating to execution or non-execution of the operation item and being effective only at restart of the automatic analyzer after power shutdown during inspection, to accept input of the setting from the operator, and at restart of the automatic analyzer after power shutdown during inspection, to automatically execute or omit execution of the operation item as has been set by the operator, in accordance with the setting read from the storage section, characterised in that said operation item to be automatically executed is an operation item required to be automatically executed at the next startup of the automatic analyzer after power shutdown at the end of the inspection. a sample storage section for accommodating a plurality of samples; a reagent storage section for accommodating a plurality of reagents; an analysis section for carrying out an analysis by reacting the sample with the reagent in an inspection started on instruction by an operator; a display; a power switch which can be pressed for power shutdown of the automatic analyzer at the end of inspection as well as during inspection; a storage section for storing a setting of an operation item to be automatically executed, the setting relating to execution or non-execution of the operation item and being effective only at restart of the automatic analyzer after power shutdown during inspection; and a control section configured, upon pressing of the power switch by an operator during the inspection: to display on said display a screen for the setting of the operation item to be automatically executed, the setting relating to execution or non-execution of the operation item and being effective only at restart of the automatic analyzer after power shutdown during inspection, to accept input of the setting from the operator, and at restart of the automatic analyzer after power shutdown during inspection, to automatically execute or omit execution of the operation item as has been set by the operator, in accordance with the setting read from the storage section, characterised in that said operation item to be automatically executed is an operation item required to be automatically executed at the next startup of the automatic analyzer after power shutdown at the end of the inspection. to display on said display a screen for the setting of the operation item to be automatically executed, the setting relating to execution or non-execution of the operation item and being effective only at restart of the automatic analyzer after power shutdown during inspection, to accept input of the setting from the operator, and at restart of the automatic analyzer after power shutdown during inspection, to automatically execute or omit execution of the operation item as has been set by the operator, in accordance with the setting read from the storage section, characterised in that said operation item to be automatically executed is an operation item required to be automatically executed at the next startup of the automatic analyzer after power shutdown at the end of the inspection.