This study was designed to assess the factor structure of the Spanish Burnout Inventory in a sample of 245 Portuguese police officers working in Lisbon. Using exploratory factor analysis (EFA), 4 factors were extracted, reproducing the original model: Enthusiasm toward the job (5 items), Psychological exhaustion (4 items), Indolence (6 items), and Guilt (5 items). However, item 20 -designed to assess Guilt- was grouped with both items of Indolence and Psychological exhaustion. The results of the study support the factor validity of the SBI and the adequate internal consistency of its dimensions, with Cronbach Alpha higher than .70. The results suggest that SBI is an adequate instrument to assess burnout in Portuguese police officers
