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Purpose: The objective of this study was to determine the effects of concentration training on cognitive ability. Methods: For this study, 30 subjects were randomly assigned to experimental and control groups. The experimental group received concentration training using a computerized cognitive rehabilitation program. The intervention was performed three times a week for four weeks. The period of each session was 10 minutes. The control group received the training with a virtual driving simulator. To assess cognitive ability, a virtual driving simulator was used. Results: This study shows the following results. First, the control group showed a significant increase in interference task 1 compared with the experimental group. The control group displayed statistically significant speed increases in interference task 1 compared with the experimental group. Third, the experimental group showed significant increases in the score and the speed of the ability to stay in one’s lane compared with the control group. Conclusion: This study showed that concentration training had positive effects on cognitive ability, but the learning effect of the virtual driving simulator influenced the score and speed of interference task 1.