A method of verifying a measurement accuracy of an electric characteristic measuring apparatus by using the electric characteristic measuring apparatus to temporally measure electric characteristics of a control sample before temporally measuring electric characteristics of a blood sample, the method at least comprising: a reference range setting process for setting a reference range for measured electric characteristics pre-stored in an information storage medium, and a process for determining from temporally measured electric characteristics of the control sample and the reference range whether or not the measurement accuracy of the electric characteristic measurement apparatus is verified, wherein the control sample for measurement of electric characteristics at least includes a liquid containing a blood coagulation factor, and micro particles, and a density of the micro particles in the liquid is different from a mass density of the liquid containing the blood coagulation factor, each of the micro particles being different in conductivity or dielectric constant from the liquid containing the blood coagulation factor, the liquid being a dispersing liquid for dispersing the blood coagulation factor and/or the micro particles, and the method includes preparing the control sample for measurement of electric characteristics by adjusting the mass density of the micro particles in the liquid and a size of the micro particles in accordance a suitable measurement time, determining a change in conductivity or dielectric constant of the blood sample with respect to time, and determining a time until the conductivity or dielectric constant is suppressed to a threshold value, and/or an amount of change in conductivity or dielectric constant until the time at which the conductivity or dielectric constant is suppressed to the threshold value, the time and/or the amount of the change in the conductivity or dielectric constant being compared with the reference range to determine whether or not the measurement of the electric characteristic measurement apparatus is verified, wherein the measurement accuracy of the electric characteristic measurement apparatus is verified if the time and/or the amount of the change in the conductivity or dielectric constant fall within the reference range. a reference range setting process for setting a reference range for measured electric characteristics pre-stored in an information storage medium, and a process for determining from temporally measured electric characteristics of the control sample and the reference range whether or not the measurement accuracy of the electric characteristic measurement apparatus is verified, wherein the control sample for measurement of electric characteristics at least includes a liquid containing a blood coagulation factor, and micro particles, and a density of the micro particles in the liquid is different from a mass density of the liquid containing the blood coagulation factor, each of the micro particles being different in conductivity or dielectric constant from the liquid containing the blood coagulation factor, the liquid being a dispersing liquid for dispersing the blood coagulation factor and/or the micro particles, and the method includes preparing the control sample for measurement of electric characteristics by adjusting the mass density of the micro particles in the liquid and a size of the micro particles in accordance a suitable measurement time, determining a change in conductivity or dielectric constant of the blood sample with respect to time, and determining a time until the conductivity or dielectric constant is suppressed to a threshold value, and/or an amount of change in conductivity or dielectric constant until the time at which the conductivity or dielectric constant is suppressed to the threshold value, the time and/or the amount of the change in the conductivity or dielectric constant being compared with the reference range to determine whether or not the measurement of the electric characteristic measurement apparatus is verified, wherein the measurement accuracy of the electric characteristic measurement apparatus is verified if the time and/or the amount of the change in the conductivity or dielectric constant fall within the reference range.