Objective: This study sought to investigate the effect of temperament dimension on personality disorder traits, as well as personality disorder traits in accordance with adult temperament clusters. Methods: Correlation analysis, cluster analysis, variance analysis, and chi-square tests were conducted to identify the relationship between each variable, the setting and classification of temperament clusters, and the cluster characteristics. Data were collected via a questionnaire administered to 349 adults above the age of 18, and a one-way ANOVA was conducted to compare the traits of personality disorders among the clusters. Results: There was a significant correlation between most temperament and personality disorder traits, and it was appropriate to divide the data into four groups: ‘Negative inhibitory’, ‘Normal’, ‘Positive active’, and ‘Inactive dysregulatory’. ‘Negative inhibitory’ and ‘Inactive dysregulatory’ were the most closely related to personality disorder traits, and by increasing the explanatory power on the relationship between specific temperament traits and personality disorder traits, it was possible to identify temperament combination types that are highly related to personality disorder traits. Conclusions: By clustering the various temperament variables of adults, analyzing the relationship between personality disorder traits, and verifying the difference of theses traits, we confirmed the type group that is more temperamentally-related to personality disorder traits. We then expand the viewpoint from the approach of predicting and understanding personality disorders from temperament. In other words, this study provides basic data for preventive and effective interventions regarding personality disorders by identifying the type of temperament vulnerable to personality disorders via an understanding of temperament clusters.