In the process of teaching and learning, discipline and motivation are two things that always become a concern for students and teachers. Teachers’ discipline in the process of teaching and learning is needed to encourage the students’ motivation. This research aims to find out the English teachers’ discipline, to find out the students’ motivation in learning English and, to investigate whether or not there is a correlation between English teachers’ discipline and students’ motivation in learning English at SMA Muhammadiyah 7 Yogyakarta. The data of this research were collected from 132 students of SMA Muhammdiyah 7 Yogyakarta batch 2015. To answer the first and the second research questions, questionnaire was used. Then, the data were analyzed using descriptive statistics in SPSS program version 22.0 to find out teachers’ discipline and students’ motivation. While to answer the third research questions about the correlation between teachers’ discipline and students’ motivation in learning English was used Pearson Product Moment Correlation coefficient (r). The result of this research indicated that the English teachers’ of SMA Muhammadiyah 7 Yogyakarta have good discipline. The mean score of English teachers’ discipline was 3.13 which lies in the “good” category. Meanwhile, the mean score of students’ motivation in learning English was 3.20 which means that the students of SMA Muhammadiyah 7 Yogyakarta have high motivation in learning English because 3.20 lies in the “Moderate” category. The result of the Pearson Product Moment Correlation was 0,969. The result showed that there was a positive strong correlation between the English teachers’ discipline and students’ motivation in learning English. The researcher decided that the alternative hypothesis (H1) is accepted and the null hypothesis (H0) is rejected.