We performed 3D-MR imaging with compressed sensing on the thoracic outlet of 23 normal volunteers, comparing it with conventional 2D-MR imaging. The image quality score of 3D-PDWI with compressed sensing was significantly lower than that of 2D-PDWI. However, no significant difference in the image quality score of MRA with compressed sensing due to arm position was demonstrated. Subclavian arterial stenosis during humeral elevation was shown in 30.4% of asymptomatic subjects without gender predominance. 3D-MR imaging using compressed sensing enables us to evaluate the kinematics of the thoracic outlet, and may contribute to the diagnosis of TOS in clinical settings.