The purpose of the current study was to improve the deaf students' expressive writing skill in class IV SLB Dharma Bhakti Bantul by using the serial picture. This study was classified into Classroom Action Research. The primary data of the study were the process description and the students’ learning outcome. The primary data were supported by the observation result. The results of the study were analyzed by using descriptive qualitative analysis. The data were collected by using: 1) observation, 2) test, 3) interview. The result of the study showed that serial picture could be used to improve the deaf students’ expressive writing skill in class IV of SLB Dharma Bhakti Bantul. This was shown by the students' improvement of expressive writing skill from cycle I and II. There was significant improvement by achieving minimum mastery criteria of 60.