This study investigated on the use of edmodo in teaching writing personal letter for the eleventh graders. English teachers often put writing in the list of priorities in teaching. Writing is essential for students. The main problem that students faced in writing is boredom. English teachers should leave a conventional way of teaching writing and try to provide a creative way for teaching writing. This study had two research questions; (1) How is The implementation of teaching writing personal letter by using Edomodo And (2) How is Student dificulty in learning writing personal letter by using edmodo? This study was a descriptive qualitative. The subjects were the students of eleventh grade of IPA SMA PGRI 5 Sidoarjo and the teacher. The instruments which were used in this research are observation field note, and questionnaires. The finding of the study showed that teaching writing personal letter by using edmodo letter could attract students willing in learning personal letter. It proved by the condition where students were active during the teaching and learning process. The finding also showed that teaching writing personal letter involving writing personal letter got a positive response from the students. The boredom in writing that commonly felt by the students could be reduced. Moreover, the positive response is showed by the result of the students‟ works. Students could deliver idea in their writing. However, students still had difficulty dealing with grammar. In conclusion, the application of edmodo in teaching writing personal letter was successfully applied by the teacher. It was because the teacher chose an appropriate level of material and students‟ input. It also got positives responses from the students. They were agree that it could reduce their boredom in writing. Another positive response was showed in the result of students‟ works. Students had been able to deliver their ideas in their writing.