The main purpose of this study is to find out dimensions of English learning style which is manifest in English underachieving student in high school. In this study, 148 English underachieving high school students responded to questionnaire when it comes to English learning style. The items in the questionnaire were based on Learning Style Inventory (LSI) by Kolb (2007) who categorized student's learning style. The subjects' responses to the questionnaire were submitted to SPSS version 20.0 to analyze the salient dimensions of English learning style. The statistical results of factor analysis revealed three dimensions of English learning style of underachieving student: self-direction, creativity and reactivity. The contribution of three dimensions to English proficiency has been investigated through regression and cluster analysis, in which the more dimensions they had, the higher they had English proficiency level. The findings of this study showed that English learning style held by underachieving student could be explored on the basis of differentiated features in isolation from intermediate and high level student.