An apparatus for use in measuring a component contained in a sample, the apparatus comprising a measuring device and a cartridge, the cartridge comprising: at least a heat-treatment well for performing heat treatment of the sample; and a reaction well for reacting the component to be measured in the sample with a material specifically reacting therewith, and the measuring device comprising: a cartridge-accommodating portion for accommodating the cartridge; a dispensing portion comprising a pipette tip for dispensing a reagent and/or a sample to each well on the cartridge accommodated in the cartridge accommodating portion; a measuring portion for measuring a reaction product on the cartridge accommodated in the cartridge accommodating portion; and a temperature controlling portion capable of controlling at least the heat-treatment well and the reaction well of the cartridge to desired temperatures different from each other, characterised in that: the cartridge is sealed with a seal on its top; information selected from the group consisting of information on a sample, information on an analyzing item, information or reagent management, and information on a calibration curve used for measurement is recorded on the seal; the pipette tip is capable of breaking the cartridge seal; the record of the information is configured so as to be broken by breaking the seal with the leading end of the pipette tip when the cartridge is used, whereby whether or not the cartridge is used is determined. at least a heat-treatment well for performing heat treatment of the sample; and a reaction well for reacting the component to be measured in the sample with a material specifically reacting therewith, and the measuring device comprising: a cartridge-accommodating portion for accommodating the cartridge; a dispensing portion comprising a pipette tip for dispensing a reagent and/or a sample to each well on the cartridge accommodated in the cartridge accommodating portion; a measuring portion for measuring a reaction product on the cartridge accommodated in the cartridge accommodating portion; and a temperature controlling portion capable of controlling at least the heat-treatment well and the reaction well of the cartridge to desired temperatures different from each other, a cartridge-accommodating portion for accommodating the cartridge; a dispensing portion comprising a pipette tip for dispensing a reagent and/or a sample to each well on the cartridge accommodated in the cartridge accommodating portion; a measuring portion for measuring a reaction product on the cartridge accommodated in the cartridge accommodating portion; and a temperature controlling portion capable of controlling at least the heat-treatment well and the reaction well of the cartridge to desired temperatures different from each other, characterised in that: the cartridge is sealed with a seal on its top; information selected from the group consisting of information on a sample, information on an analyzing item, information or reagent management, and information on a calibration curve used for measurement is recorded on the seal; the pipette tip is capable of breaking the cartridge seal; the record of the information is configured so as to be broken by breaking the seal with the leading end of the pipette tip when the cartridge is used, whereby whether or not the cartridge is used is determined. the cartridge is sealed with a seal on its top; information selected from the group consisting of information on a sample, information on an analyzing item, information or reagent management, and information on a calibration curve used for measurement is recorded on the seal; the pipette tip is capable of breaking the cartridge seal; the record of the information is configured so as to be broken by breaking the seal with the leading end of the pipette tip when the cartridge is used, whereby whether or not the cartridge is used is determined.