A blood component measuring device that is adapted to measure a blood component amount with a biosensor in which blood is introduced, and a blood component contained in the blood is oxidized and reduced by an oxidoreductase, the device comprising: a blood component amount measurement means that is adapted to detect an oxidation-reduction current generated by the oxidation-reduction when a first voltage is applied to a first electrode pair (21,22) of the biosensor, and that is adapted to convert the oxidation-reduction current into the blood component amount; a blood cell amount measurement means that is adapted to detect a current generated when a second voltage is applied to a second electrode pair (23,24) of the biosensor, and that is adapted to convert the detected current into a blood cell amount contained in the blood; a measurement control means that is adapted to control the blood component amount measurement means to apply the first voltage to the first electrode pair (21,22), to detect an oxidation-reduction current corresponding to the blood component amount more than once at predetermined timing of measurement of the blood component amount, and thus to measure the blood component amount more than once within a predetermined period after the introduction of the blood into the biosensor, and that also is adapted to control the blood cell amount measurement means to apply the second voltage in pulses to the second electrode pair (23,24) within a predetermined short time before, during, or after the predetermined timing of the measurement of the blood component amount and only at timing of measurement of the blood cell amount in the predetermined period, to detect a current corresponding to the blood cell amount, and thus to measure the blood cell amount more than once within the predetermined period; and a blood component amount correction means that is adapted to correct the blood component amount measured by the blood component amount measurement means based on at least a part of a plurality of blood component amounts measured by the blood component amount measurement means and a plurality of blood cell amounts measured by the blood cell amount measurement means under the control of the measurement control means. a blood component amount measurement means that is adapted to detect an oxidation-reduction current generated by the oxidation-reduction when a first voltage is applied to a first electrode pair (21,22) of the biosensor, and that is adapted to convert the oxidation-reduction current into the blood component amount; a blood cell amount measurement means that is adapted to detect a current generated when a second voltage is applied to a second electrode pair (23,24) of the biosensor, and that is adapted to convert the detected current into a blood cell amount contained in the blood; a measurement control means that is adapted to control the blood component amount measurement means to apply the first voltage to the first electrode pair (21,22), to detect an oxidation-reduction current corresponding to the blood component amount more than once at predetermined timing of measurement of the blood component amount, and thus to measure the blood component amount more than once within a predetermined period after the introduction of the blood into the biosensor, and that also is adapted to control the blood cell amount measurement means to apply the second voltage in pulses to the second electrode pair (23,24) within a predetermined short time before, during, or after the predetermined timing of the measurement of the blood component amount and only at timing of measurement of the blood cell amount in the predetermined period, to detect a current corresponding to the blood cell amount, and thus to measure the blood cell amount more than once within the predetermined period; and a blood component amount correction means that is adapted to correct the blood component amount measured by the blood component amount measurement means based on at least a part of a plurality of blood component amounts measured by the blood component amount measurement means and a plurality of blood cell amounts measured by the blood cell amount measurement means under the control of the measurement control means.