This research aims to : (1) know the efforts of Arabic language teachers to improve Arabic language skills of grade X students at SMA (Senior High School) Muhammadiyah 7 Yogyakarta; (2) analyze the obstacles faced by Arabic language teachers to improve Arabic language skills of grade X students at SMA Muhammadiyah 7 Yogyakarta, (3) know the effectiveness of Arabic language teachers‟ effort to improve Arabic language skills of grade X students at SMA Muhammadiyah 7 Yogyakarta. This is a descriptive qualitative research conducted at SMA Muhammadiyah 7 Yogyakarta. The subjects of the research were 7 Arabic language teachers teaching grade X students at SMA Muhammadiyah 7 Yogyakarta and 6 grade X students at SMA Muhammadiyah Yogyakarta in which 3 students were from natural sciences program and 3 students were from social sciences programs. The studied object was the efforts of Arabic language teachers to improve Arabic language skills. The data of the research were collected from interview, observation, and documentation. The collected data were then analyzed using data reduction, data display, and conclusion drawing. The findings of the research are : (1) The efforts of Arabic language teachers to improve Arabic language skills of students at SMA Muhammadiyah 7 Yogyakarta are done using various strategies and learning methods. The strategies implemented by the teachers are strategies of qiro‟ah (reading), kitabah (writing), istima‟ (listening) and kalam (speaking). Among those strategies, the teachers tend to use kalam strategy. Meanwhile, the methods implemented by the Arabic language teachers at SMA Muhammadiyah 7 are grammar translation method, direct method, reading method, audio lingual method, and mixed method. However, the teachers tend to use grammar translation method. (2) the obstacles experienced by the Arabic language teachers to improve Arabic language skills of students at SMA 7 Yogyakarta are from both internal and external factors. The internal factors include ashwat „arabiyah, mufrodat, quwa‟id and tarakib, and the most frequent obstacles faced by the teachers are ashwat „ arabiyah and qowa‟id. Meanwhile, the external factors include less competent teachers, improper learning hours, students‟ different background and abilities. (3) The efforts of Arabic langauge teachers to improve Arabic language skills of students at SMA Muhammadiyah 7 Yogyakarta has not been effective proven with the responses given by the students. They argue that the efforts done by the teachers have not been effective yet seen from the way they teach. In addition, it is also proven with the test result in which 62.9 % of 27 students get scores under the minimum criteria of mastery learning.