Pattern poetry writing can be a way to motivate vocational highschool students to be more involved in vocabulary learning. This study developed a vocabulary teaching-learning model using pattern poetry writing. Out of the twenty-five patterns suggested by Holmes and Moulton (2001), four patterns were modified and applied. In order to examine the effectiveness of this model, the current experiment was conducted with samples from 112 vocational high school students in Busan. The main findings of this study were as follows. First, writing pattern poems was effective in improving the students’ ability to understand the semantic relations of the words, the parts of speech, and improving productive vocabulary. Second, vocabulary learning strategies were frequently explored in pattern poem writing classes. Last, the students\' attitude during and after the simple pattern poems classes was positively changed. Confirming previous research conducted on elementary students and university students, this study proved that teaching through pattern poems is applicable to all proficiency levels of students.