An analyzer for maintaining analysis accuracy by managing initiation timings of a calibration analysis process, in which a calibrator is analyzed, and a blank analysis process, in which a blank sample is used, independently for each analytical item, the analyzer comprising: a display unit, and a control unit including a management unit, wherein the management unit is configured to manage, for each analytical item, initiation timings of the calibration analysis process and the blank analysis process independently, the management unit is configured to accept at least the blank analysis process before an expiration date of a result of a last performed blank analysis process and when a reagent bottle is supplied based on lot information or bottle information of the supplied reagent bottle, the management unit is configured to accept the calibration analysis process before an expiration date of a result of a last performed calibration analysis process and when a reagent bottle is supplied based on lot information or bottle information of the supplied reagent bottle, and the management unit is configured to accept the calibration analysis process along with the blank analysis process when the management unit determines that the remaining time before the expiration date of the result of the last performed blank analysis process is within a predetermined period of time Tb that is set based on a time period that is required for performing the blank analysis process and further the remaining time before the expiration date of the result of the last performed calibration analysis process is within a predetermined period of time Tc that is set based on a time period that is required for performing the calibration analysis process and a time period that is required for performing the blank analysis process, and accept the calibration analysis process and the blank analysis process independently otherwise, and wherein the control unit is configured to display on the display unit in an acceptance menu for accepting by an operator the requests of the calibration analysis process and the blank analysis process accepted by the management unit and which thus need to be performed according to the management unit. a display unit, and a control unit including a management unit, wherein the management unit is configured to manage, for each analytical item, initiation timings of the calibration analysis process and the blank analysis process independently, the management unit is configured to accept at least the blank analysis process before an expiration date of a result of a last performed blank analysis process and when a reagent bottle is supplied based on lot information or bottle information of the supplied reagent bottle, the management unit is configured to accept the calibration analysis process before an expiration date of a result of a last performed calibration analysis process and when a reagent bottle is supplied based on lot information or bottle information of the supplied reagent bottle, and the management unit is configured to accept the calibration analysis process along with the blank analysis process when the management unit determines that the remaining time before the expiration date of the result of the last performed blank analysis process is within a predetermined period of time Tb that is set based on a time period that is required for performing the blank analysis process and further the remaining time before the expiration date of the result of the last performed calibration analysis process is within a predetermined period of time Tc that is set based on a time period that is required for performing the calibration analysis process and a time period that is required for performing the blank analysis process, and accept the calibration analysis process and the blank analysis process independently otherwise, and wherein the control unit is configured to display on the display unit in an acceptance menu for accepting by an operator the requests of the calibration analysis process and the blank analysis process accepted by the management unit and which thus need to be performed according to the management unit.