The relationship between creativity and writing success is a matter of curiosity for many researchers, educators, and people in general. Many would likely expect that creative individuals would have higher writing success. This study aimed to determine the mediating roles of writing self-efficacy, writing motivation, and writing disposition in the relationship between creativity and writing success of primary school students. A relational research model was used in the study conducted with 300 primary school students. Correlational analysis and mediating variable analysis were performed with the data obtained with five data collection tools. The analysis results showed significant relationships between the variables: Creativity, writing self-efficacy, writing motivation, and writing disposition were found to significantly predict writing success. In addition, the findings revealed that writing self-efficacy, motivation, and disposition each have a parallel mediating role between creativity and writing success. The study's results are discussed in connection to the pertinent research literature, and recommendations are made.