Abstract Name : Ulfah Fikria Student No. : 0806102020072 Study Program : English Education Title : Observing The Use of Peer Feedback Technique in Teaching Writing (A Qualitative Study at SMA Lab School Unsyiah, BandaAceh) Keywords: observing, peer feedback, teaching writing The purpose of this study is to find out how the teacher implemented the peer feedback in teaching writing. The subjects of the study were an English teacher and students of Class XI IPA 3 SMA Lab School Unsyiah Banda Aceh. This study was explored by using descriptive qualitative research approach in which the data was taken from observation, document, and interview. The result shows that the teacher had implemented peer feedback in teaching writing. However, the teacher did not implement one procedure of peer feedback as suggested by Alwasilah and Alwasilah (2007), and there were four procedures with few modifications. The procedure of peer feedback by Alwasilah and Alwasilah (2007) which was not implemented by the teacher was when there is something unclear, awkward, and unreasonable, ask directly to the writer. Moreover, the four procedures with few modifications are asking the students to check and to find the mistakes/errors in content, organization, grammar, word choice, and mechanics of the essay. Then, the teacher asking the students to recheck the essay on the same day. Next, these activities (collaboration and revision) were done twice. The last is the teacher asking the students to submit the essay that has been revised twice to the teacher to get another feedback. After the teacher implemented the technique, the students’ ability in writing improved.