Patent ID: 8818499

Claim:
A body fat measurement device comprising: multiple electrodes for making contact with predetermined areas of a surface of a measurement subject's body; a trunk area width detection unit configured to measure a trunk area width and a trunk area depth of the measurement subject; and a controller comprising control logic, which when executed measures a body impedance of the measurement subject's body using the multiple electrodes, and calculates a body fat mass based on the body impedance measured and the trunk area width and trunk area depth detected by the trunk area width detection unit, wherein the multiple electrodes include at least back area electrodes for making contact with the surface of a back area that corresponds to an area of the measurement subject's trunk area on the back side thereof; the body fat measurement device further comprises a rigid framed fitting unit that is configured to be disposed so as to surround the measurement subject's trunk area during a fitted state where the measurement subject is in an upright position, is configured to bring the back area electrodes into contact with the measurement subject's back area surface in a pressurized state, and is configured to be movable in at least a vertical direction from a stored state to the fitted state; the back area electrodes are provided on a surface of the fitting unit in an exposed state, and a display is provided on a surface of the fitting unit disposed on an opposite side of the measurement subject from the back area electrodes in the fitted state, and the back area electrodes are provided on a rear area of the fitting unit so that the surfaces of the back area electrodes that make contact with the back area surface face forward in the fitted state; the trunk area width detection unit is provided in the fitting unit and is configured of a non-contact range sensor provided on at least one of a right side portion and a left side portion of the fitting unit and a non-contact range sensor provided on a front portion of the fitting unit; the multiple electrodes further include upper limb electrodes for making contact with the surfaces of the measurement subject's upper limbs; and the upper limb electrodes are provided on the surface of the fitting unit in an exposed state.