This research is focused on the use of authentic material in teaching descriptive text to improve students’ writing ability. This research is aimed to know the implementation of authentic materials to improve students’ writing ability in descriptive text. This research is about the use of authentic materials to improve students’ writing ability of descriptive text at tenth grade of MA Matholi’ul Huda Bugel Jepara in the academic year of 2015/2016. Authentic material is the materials which have been produced for purposes other than to teach language. The research design is classroom action research that consist of preliminary research and two cycles. There are four activities, there are planning, acting, observing and reflecting. There are also three instruments in this research, the first is observation check list, second is documentation, and the last is test. All data were analyzed using percentage descriptive quantitative which used some formula to find the interval grade of students, and finding the score of average. The result of the research showed that there was improvement of students’ ability in writing descriptive ability in writing descriptive text after being taught using authentic material. The result can be seen at the mean of score in each cycle. The average is increase from 62 in pre-cycle to 70, 5 in first cycle, and 80, 51 in second cycle. Finally the result of this study showed that the implementation of using authentic material can maximize the students’ writing skill in descriptive text.