Very little information is available on the extent to which the private health sector is involved in clinical management of HIV/AIDS in Nigeria. This study assessed the potentials and existing capacity of 15 private health facilities in Nassarawa state for clinical management of HIV/AIDS. Information was obtained from 25 staff (15 proprietors and 10 professionals) of the randomly selected health facilities in the state using structured questionnaire. Of the 15 health facilities, three provided voluntary counselling and testing (VCT), seven had never admitted persons living with HIV/AIDS (PLWHA), two provided laboratory services, none provided home-based care for PLWHAs, two had anti-retro-viral drugs in stock, two had rooms for counselling, three had full-time doctors, and six had registered nurses. Of the 25 health workers, 5 had skills/training in conducting VCT, 15 had skills in the treatment of opportunistic infections, 14 were aware of anti-retro-viral drugs and 13 did not feel comfortable attending to PLWHAs. The study recommended capacity building on HIV/AIDS related services for the private health-workers.