The aim of this study was to determine the relationship between the writing motivation levels and written expression skills among secondary school students. The study was carried out using the correlational research model of the quantitative research methods. The study group for this study consisted of 230 students attending three different secondary schools in the fall semester of the 2018-2019 school year. For the selection of the study group, the convenient sampling method of the non-probabilistic sampling methods was used. The data collection tools for this study were the writing motivation scale, the writing evaluation form and a personal information form. The writing studies were assessed separately by three researchers. Statistical analyses were performed on the data collected from the writing motivation scale, which was applied to determine the writing motivation levels of the students, and the writing evaluation form, which was assessed using the writing studies. Based on the findings of this study students with high writing motivation scores had high writing evaluation scores.