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This study aims to analyze the effect of cognitive style on students' mathematical creative thinking skills. This study uses an ex post facto approach with a 2 × 2 factorial design (gender × cognitive style) and was conducted on 10th grade students at Senior High School 5 Tegal City in the 2025/2026 academic year. The research sample consisted of 49 students selected through proportional stratified random sampling. Cognitive ability was measured using the Group Embedded Figures Test (GEFT) to categorize students into field-dependent (FD) and field-independent (FI) cognitive styles, while mathematical creative thinking ability was measured through a mathematical creative thinking ability test. Data analysis used two-way ANOVA to test main effects and interactions. The results showed a significant difference in mathematical creative thinking ability between FD and FI students, with higher achievement in the FI group. Meanwhile, differences based on gender and gender × cognitive style interactions were not significant. These findings confirm that cognitive ability influences students' mathematical creative thinking ability, so learning needs to consider students' cognitive characteristics to optimize the development of mathematical creative thinking.