We demonstrate a high electron conductivity (>100 S\/cm and up to 1000 S\/cm) of tungsten suboxide W(18)O(52.4-52.9) (or equivalently WO(2.91-2.94)) nanotubes (2-3 nm in diameter, \u223c \u00b5m long). The conductivity is measured in the temperature range 120 to 300K by a four-probe scanning tunneling microscope in ultra-high vacuum. The nanotubes are synthesized by a low-temperature and low-cost solvothermal method. They self-assemble in bundles of hundreds of nanotubes forming nanowires (\u223c \u00b5m long, few tens nm wide). We observe a large anisotropy of the conductivity with a ratio (longitudinal conductivity\/perpendicular conductivity) of \u223c 1E5. A large fraction of them (\u223c 65-95%) shows a metallic-like, thermal activation less, electron transport behavior. Few of them, with a lower conductivity from 10 to 100 S\/cm, display a variable range hopping behavior. In this latter case, a hopping barrier energy of \u223c 0.24 eV is inferred in agreement with the calculated energy level of the oxygen vacancy below the conduction band. This result is in agreement with a relative average concentration of oxygen vacancies of \u223c 3%, for which a semiconductor-to-metal transition was theoretically predicted. These tungsten suboxide nanostructures are prone to a wide range of applications in nanoelectronics.<\/p>\n\n\n