Teaching materials are key components which should importantly be considered in a language program. Teaching materials are divided into authentic materials and created materials. This research was aimed to investigate what kind of authentic materials which commonly used by pre-service teachers at EED of UMY in their teaching practice. Furthermore, the significances and the disadvantages of using authentic materials were also explored by the researcher. The researcher used descriptive qualitative design to achieve the purpose of the research. The participants of this research were four pre-service teachers batch 2013 of EED of UMY. The researcher chose in-depth interview to elicit information from the participants. Finally, the researcher found the kinds of authentic material, which were divided into two parts, printed and auditory that were mostly used by pre-service teachers in EED UMY. The research found that authentic materials have significances those are; motivating the students, interesting, easily found, multifunction, and improving teacher’s creativity. Otherwise, the disadvantages of using authentic materials for students and teachers were also presented. Difficult language, out-dated easily, and difficult to determine the appropriate one were the disadvantages of using authentic material in language teaching.