This research is about the reading skills of the grade I students and the method is classroom action research by doing classroom study using lift the flap book media. The purpose of the research is to improve the reading skills of the grade I students of SD Negeri Puren Depok Sleman using the lift the flap book media. Learning to read in grade I SD Negeri Puren is still not in accordance with the expected results. Evidenced by the results of reading skills, there are still many who have not reached the complete score. The results showed that the use of lift the flap book media can improve student’s reading skills. This can be seen from the increase in the learning process on each indicator of reading ability. Students are increasingly interested in learning, and teachers have used other media besides books from school. The process of learning to read has increased, namely that the average score increase from cycle 1 the score is 76 and in cycle 2 the score is 83. Students whose average scores are above the average increase from cycle 1 by 46.4% and cycle 2 as much as 85%.Penelitian yang dilakukan ini tentang kemampuan membaca siswa kelas 1, dan metode yang digunakan adalah penelitian tindakan kelas (classroom action research) dengan melakukan pembelajaran didalam kelas menggunakan media lift the flap book. Tujuan penelitian adalah kemampuan membaca siswa kelas 1 SD Negeri Puren Depok meningkat dengan menggunakan bantuan media lift the flap book. Kegiatan belajar mengajar membaca di SD Negeri Puren kelas I hasilnya masih belum sesuai dengan yang diharapkan. Terbukti dengan kemampuan membaca masih banyak yang yang nilainya belum sesuai yang diharapkan. Hasil penelitian kemampuan membaca meningkat setelah menggunakan media lift the flap book hal ini dapat diketahui meningkatnya pada proses pembelajaran pada setiap indikator kemampuan membaca. Siswa semakin tertarik mengikuti pembelajaran, dan guru sudah menggunakan media lain selain buku dari sekolah. Proses pembelajaran membaca mengalami peningkatan yaitu nilai rata-rata meningkat dari siklus 1 nilainya 76 dan siklus 2 nilainya 83. Siswa yang nilainya diatas rata-rata meningkat dari siklus 1 sebanyak 46,4% dan siklus 2 sebanyak 85%.