A body fat measurement device includes hand electrodes that contact both hands, back area electrodes that contact the surface of a trunk area of the back, foot electrodes that contact both feet, a trunk area width detection unit for measuring the width and depth of the trunk area, a body impedance measurement unit that measures the body impedance of a body using the multiple electrodes and a body fat mass calculation unit that calculates a body fat mass based on the body impedance and the width and depth of the trunk area. The back area electrodes that make contact with the surface of the back of the trunk area are provided in a fitting unit in an exposed state, as well as the trunk area width detection unit. Accordingly, a body fat measurement device can measure a body fat mass easily and accurately in a household or the like.
