A body fat monitor structure includes a foot pad and a body fat monitor disposed in the body fat monitor. The foot pad includes a base layer and a cloth layer laminated on the base layer. The base layer has a hollow area, and the body fat monitor is accommodated in the hollow area. The body fat monitor includes housing and a set of measurement components disposed in the housing. The set of measurement components at least has an electrical contact exposed from the housing, the cloth layer has a sensor portion disposed corresponding to the electrical contact, and the sensor portion is configured by conductive yarn knitted on the cloth layer and exposed between an upper and a lower surfaces of the cloth layer.
