Abstract: Method of measuring the temperature of a running filiform element, without mechanical contact with the element, and devices for implementing such method. According to the invention, a fluid of which the temperature and the flow rate have been measured is supplied to a chamber through which a filiform element is moving. Part of the fluid is collected in order to measure its temperature. The temperature of the element is determined from the flow rate and injection exit temperatures of the fluid. The invention is particularly applied in metallurgy to temperature measuring of yarns, tubes, sheets or metal strips, sections, and the like.