The article proposes the validation of a research tool, aimed at measuring the professional resilience of teachers. In scientific debate, the use of the resilience construct and an instrument aimed at detecting it is quite frequent, but there are few instruments to contextualize resilience in a strictly professional context. Professional Resilience of Teachers Scale [Scala di Resilienza Professionale degli Insegnanti – SRPI] can be usefully applied in stress and trauma situations that can be linked to personal experiences or emergency situations that cause teachers to face numerous unforeseen problems in their work and to implement, i.e. appraisal and coping strategies related to the concept of resilience. The SRPI was administered to a sample of 556 teachers from all school orders distributed throughout the national territory. Correlational and factor analysis made it possible to optimize the instrument, reducing the number of items from 39 to 28 and identifying the factors most involved in the proposed construct. The research confirmed high values of internal (α = .897).