The objectives of this research were to investigate whether VAK learning style as a technique has significant effects in improving students’ writing ability and the students’ interest in VAK learning style as a technique in studying English writing. This research employed quasi experimental design. The population of this research was the eleventh grade students of Science Program SMA Negeri 1 Bontomarannu in academic year 2014/2015. This research used cluster random sampling. The sample consisted of 60 students that belonged to two groups: 30 students in the experimental andcontrol group. The data was collected by using writing test and questionnaire.The findings showed that there was an improvement on the students’ writing ability after the treatment. The students’ result of posttest of experimental group was more significantly improved than the students’ result of posttest of control group by the mean score 73.2 > 58.1. The difference of both scores was statistically significant based on the t-test value at significant level0.05 inwhich the P-value is lower than the significant level (0.0001 < 0.05). The mean score of the students’ interest in the experimental group was 91.63 and it was categorized as strongly interested. Key words: VAK Learning Style, Writing, Learning Style