This study investigates the relationship between the five decision-making styles evaluated by the General Decision-Making Style Inventory, indecisiveness, and rationality in decision making. Using a sample of 102 middle-level managers, the results show that the rational style positively predicts rationality in decision making and negatively predicts indecisiveness, whereas the avoidant style positively predicts indecisiveness. (Contains 3 tables and 1 figure.)