Abstract: The purpose of this study is to investigate the relationship between personality traits and L2 learning. Numerous studies have been conducted on this topic but the results were inconclusive partly because many of them failed to use a scientific model of personality. The present study used the Big Five Model of personality traits which has been long established to represent the most basic and independent personality traits. About 176 Korean college students learning English as a Foreign Language (EFL) completed the 44 item Big Five Inventory (BFI) and reported their preferred English skills along with English proficiency test scores. The relationship between the participant’s personality traits and L2 learning variables were examined using one-way ANOVA and correlation analysis. The results show that, the mean scores of the five personality factors were around 3.0, a medium level. Furthermore, the personality traits showed no statistically significant correlation with their English proficiency test scores. In previous studies, personality traits were found to affect L2 learning either directly or indirectly through other mediating variables such as motivation and attitudes towards L2 learning and the target culture. The failure to find such meaningful relationships might have been caused by the fact that the sample size of the present study was not big enough and the measure of the participant’s English proficiency was not ideal. Nevertheless, the use of the Big Five Model of personality traits have a great potential to further the field of individual differences in L2 learning with its theoretical and explanatory strength. Further research with bigger samples and sound measures of English proficiency is warranted.