This study tested Maddi and Khoshaba's 1994 hypothesis that Hardiness is an index of mental health. A sample of 241 undergraduates (103 men and 138 women) completed the Dispositional Resilience Scale, the Revised NEO Personality Inventory, and the Psychopathology-5 Scales. Using the individual median scores on thr three subscales (Commitment, Control, and Challenge) of the Dispositional Resilience Scale. the High Hardiness group was obtained by identifying the individuals who scored above the medians on all the three subscales, whereas the Low Hardiness group mere those a ho scored consistently below the medians on all the the subscales. Multivariate analysis of variance performed for the two hardiness groups using the scales from each personality inventory indicated that the two groups had significantly different mean profiles on the NEO Personality Inventory as well as the Psyche pathology-5 Scales. Combined discriminant function analysis performed for the two hardiness groups using all the 10 scales from the two personality inventories indicated that the Mo groups had significantly different mean profiles and that the standard discriminant function coefficients were substantial (>.3) for the NEO Personality Inventory Openness (.65) and Conscientiousness (.49) scales and the Psychopathology-5 Positive Emotionality (.56) and Psychoticism (-.36) scales, supporting the tested hypothesis.