Human body temperature is an important indicator of physical condition in terms of comfort, heat or cold stresses, and of performance. This work investigates the development of a temperature sensing fabric for the continuous measurement of human body temperature, over extended periods of time. The sensing fabric was developed by laying-in a fine metal wire (as a sensing element) into a knitted structure. The operating principle of the sensing fabric is based on the inherent propensity of metal to exhibit change in electrical resistance as a result of variation in temperature. An experimental relationship between temperature and resistance showed promising validation in comparison with a synthesised model.