The main purpose of this study is to explore the relation between decision-making styles which aremeasured by the General decision-making style (GDMS) test and information processing styles whichare often termed cognitive styles and are, in this study, measured by Cognitive Style Inventory. Theauthors directed a survey research on 162 Iranian students. Structural equation modeling techniqueswere used to measure the impact of cognitive styles on decision-making styles. The authors foundthat cognitive styles have a positive impact on decision-making styles. In spite of the abundantresearch on factors that affect decision-making styles, few researches have tested the relationshipbetween cognitive styles and decision-making styles. This study examines the impact of cognitivestyles on decision-making styles in Iran. This study, like most research paper studies, cannot easily begeneralized. Furthermore, the results of this study could be affected by economic conditions.