The purpose of this study is to investigate Korean university students’ de-motivation factors in learning English. For this purpose, 125 university students who are in sports-related majors participated for the questionnaire about de-motivation factors. De-motivation factors are categorized into learner-related factors, teacher-related factors, class atmosphere factors, and their attitude toward the English language. The results show that learner-related factor is the most effective factor in de-motivation than other factors. In terms of the results, the lack of ‘learning strategies’, ‘confidence on English,’ and ‘interesting activities’ show the highest mean scores. Based on this result, it is suggested that a teacher should teach English learning strategies to increase students’ confidence in English. In addition, teachers should provide interesting activities to reduce de-motivation.