An analyzer which analyzes an analyte by using the analyte and consumables, the analyzer comprising: an automatic reading device which reads a first product information related to a consumable via an identifier given to the consumable or a container containing the consumable; and a controller which permits an analysis operation when the first product information is suitable information read by the automatic reading device via the identifier, and prompts an operator to manually enter a second product information comprising information specifying the manufacturer or seller of the consumable when the automatic reading device cannot read the identifier or the information read via the identifier is not suitable as the first product information and permits the analysis operation and storage of the input second product information when the operator has entered the second product information.