Impulsive behaviors are one of the major problematic behaviors. The purpose of this study was to develop an Impulsive Behavior Questionnaire and determine the relationship between impulsive behaviors and personality traits. Study 1 (N=417) used a 35-item questionnaire measuring each of five components of impulsive behavior: physical aggressive behavior, verbal aggressive behavior, indirect aggressive behavior, abandonment/panic behavior, and impulse buying behavior. Five impulsive behavior subscales emerged clearly from exploratory factor analysis. Study 2 (N=353) used a 25-item questionnaire and a replicated factor structure and factor loading similar to Study 1 was obtained. The scales were high in internal consistentcy. In addition, this study examined the effect of personality traits (extraversion, neuroticism, disability of attention control, aggression, and reflectivity) on impulsive behavior. The results suggested that differences in impulsive behavior varies by personality trait, suggesting that impulsive behavior might be able to classified by the type.