The purpose of the present study was to examine the relationship between styles of handling interpersonal conflict, personality, and mental health. In study 1, the Handling Interpersonal Conflict Inventory (HICI) was developed to measure five styles of handling interpersonal conflict based on a 2 dimensional, 5-style model of handling interpersonal conflicts : integrating, compromising, avoiding, yielding, and forcing. Factor analysis of data from 520 undergraduate students generated the 2 dimensional, 5-style model. In study 2, 378 undergraduate students completed the Handling Interpersonal Conflict Inventory, the Big Five Scale, the Psychological Stress Response Scale, the UCLA Loneliness Scale, and the Interpersonal Satisfaction Scale. The results suggested that the five styles of handling conflict are better predicted by personality, and also that they are related to mental health.