Recently ultrafine fibers of nanometer size and their fabrics are growingly interested not only in textile industry but also in non-textile industry, as they have excellent properties of lightness, high strength, comfort, function and etc as compared to those of conventional fibers. Evaluation of the mechanical properties is, then, important in connection with the reliability and durability of the products. Since commercialized machines are not always conventionally designed for mechanical property evaluation of nanofiber in any environments; air or fluids. We have, therefore, conducted to develop versatile testers including tension tester for strength measurement and friction tester for handle measurement. In this note, we present typical results for evaluation of mechanical properties of nanofiber/ web fabricated by means of an electrospining method.