Troglohyphantes bornensis, a new species from the western Italian Alps, is here described. According to the features of the male palp and female epigynum the new species can be assigned to Fage's III Group, Deeleman-Reinhold's marqueti group and Pesarini's microcymbium complex. All specimens were collected in the stony debris of Pugnetto caves (province of Turin, Italy), a calcschist cave complex, formerly studied by biospeleologists for the presence of several endemic species. All caves have openings into beech woods at an elevation of approximately 800 m.