This research study on improving the students’ ability in writing procedure text through picture series is an action research. This is categorized as action research since there is a self-reflective, critical, and systematic approach that is done by the researcher to identify a problematic situation as a way of improvement and changes in educational practice. In doing this action research, the researcher considers phases which involve in each cycle. Those are planning, action, observation, and reflection. Every phase is done based on the researcher’s ideas on the research. This study is aimed at exploring the improvement of the teaching and learning process writing procedure text using picture series at PBI UMY. It is also intended to identify the improvement of students’ ability in writing procedure text using picture series at PBI UMY. On the basis of the research findings and the discussions in chapter IV, some conclusions can be drawn as follows: the use of picture series promotes the improvement of students’ ability in writing procedure text and can elevate the students’ interest or motivate in the classroom. Picture series is very good in providing idea for the students to write. The students’ works are also more persistent to the idea as compared to when not using the picture series. The pictures also attract more attention from the students and motivate students to get involved in the classroom interaction with the teacher and among themselves. For the detailed works of the students, the use of appropriate diction and the improvement of the vocabulary mastery are also the effect of the use of the picture series. Further, the changes of the pictures in every meeting make the students remain interested in participating in the teaching and learning process because they do not feel bored.