The present invention relates to a tube of polytetrafluoroethylene having a thin thickness, and an object of the present invention is to provide a tube having a large tensile strength, while having a large tensile elongation at break. The object is achieved by a polytetrafluoroethylene tube having a thickness of 0.1 mm or less, a tensile elongation at break of 350% or more, and a melting energy of 0.6 J/g or more which is calculated from an endothermic peak at 370°C±5°C in a procedure of increasing a temperature in differential scanning calorimetry (DSC).
