Treatment of bisphosphonate-related osteonecrosis of the jaw (BRONJ) remains an intractable problem in many cases. Recent literatures have shown that the new treatment modality using teriparatide may be beneficial to BRONJ. However, the teriparatide therapy was not effective in all cases. It would be necessary to assess the therapeutic effectiveness of teriparatide with predictable procedures to treat BRONJ. We report here two cases of BRONJ treated by adjunctive teriparatide therapy for 6 months while simultaneously performing the monitoring of changes of bone turnover markers and the quantitative assessment of bone scintigraphy. Six months after the combination of teriparatide and conservative treatment, CT showed evidence of bone regeneration and the intraoral wound was completely healed. Biochemical bone formation markers were monitored at the time points of 0, 1, 3 and 6 months. Almost of all the markers related to the bone formation and resorption revealed an increase during the teriparatide treatment. The uptake area and quantitative value of technetium-99m-methylene diphosphonate showed a reduction after the administration of teriparatide. It was strongly suggested that teriparatide therapy is one of the useful treatments for BRONJ based on monitoring bone turnover results and employing bone scintigraphy.