The purpose of this study was to investigate the relationship of personality factors as measured by the 16PF Personality Questionnaire to Type A behavior as measured by the Student Form of the Jenkins Activity Survey (SJAS). One hundred and fourteen undergraduates were administered the SJAS and the 16PF Personality Questionnaire. Correlational and discriminant analyses revealed several systematic relationships between specific personality factors and Type A Behavior. The correlational analyses revealed nine significant correlations, while the discriminant analysis revealed six factors that discriminated between Type A and Type B personalities. The most important of these were the factors Venturesome, Suspicious, and Conscientious. These results indicate that the 16PF is a useful personality inventory that can discriminate Type A from Type B personalities as measured by the SJAS.