The officers were grouped according to the frequency with which they had made claims between January 1971 and October 1980. They completed a biographical data sheet, the Guilford-Zimmerman Temperament Survey, and the Mortimer-Filkins Questionnaire. Findings showed that accident-prone officers differed in demonstrable ways from officers who were less likely to be injured. Accident-prone officers with 10 or fewer years of service seek social contact and seek the limelight more than their less accident-prone colleagues. They are more likely to be belligerent, hostile, and contemptuous of others and to tend more toward problem drinking. Other dominant features of their personalities were hypersensitivity, self-centeredness, suspiciousness, resentment, and a desire to dominate others. By contrast, accident-prone officers with 11 or more years of service have a personality style that is dominated by avoidance of social activities and contacts. They are also more self-defensive and prestige-seeking than their colleagues. Among these officers, however, age is negatively correlated with the number of injury claims. Educational and preventive programs should rest on awareness of these results. Tables.