Cognitive control can help decrease depression. Previous studies have focused on the relationship between individual factors and cognitive control. However, the relationship between social support, which may increase cognitive control, and cognitive control has not been revealed. Therefore, we investigated the relationship between cognitive control and social support. We conducted a questionnaire survey with 171 university students and implemented a covariance structure analysis based on our hypothesis. The results indicated that instrumental support, which is one type of social support, increased cognitive control. This study showed that social support increased cognitive control.