This study aims at investigating how the international students' attitudes towards English have changed over th last 3 years in Korea. Forty international students participated in the questionnaire survey three times in 2018, 2019 and 2020. The results were shown as follows: Overall, the mean score of attitudes towards English decreased proportionally over time. English use has also decreased over time. When analyzing these attitudes towards English by the degree of English proficiency, the group with higher English proficiency at the time of admission had a more higher score of attitude to English in three year questionnaire surveys. In addition, these attitudes towards English have changed in small in the group of higher English proficiency over time, while the big change appeared to the group of lower English proficiency. The results of this study imply that English-based international students' attitudes towards English are likely to change over time in Korea, and that groups with relatively low English proficiency are more likely to change than groups with higher English proficiency.