We assessed the cerebral blood volume response in the bilateral frontal area in 10 healthy subjects during the design fluency task, verbal fluency task, and hyperventilation measured by 24-channel near-infrared spectroscopy. Oxygenated and total hemoglobin increased during the design fluency task and verbal fluency task and decreased during hyperventilation bilaterally, while deoxygenated hemoglobin did not change. The test-retest reliability examined in five subjects was acceptable to assess the cerebrovascular response to cognitive tasks and hyperventilation.