The medical records of twenty-one patients with suprascapular nerve palsy were reviewed retrospectively. Nine patients had isolated suprascapular nerve lesions and twelve patients accompanied axillary nerve lesions. In trauma cases, combined nerve lesions were common and severe. In three cases isolated suprascapular nerve lesions were noted spontaneously. Isolated infraspinatus muscle lesions were noted in four cases which were due to compressions of suprascapular nerves at the spinoglenoid notch, and in one case from ganglionic cyst was diagnosed by ultrasonography. At initial examination, three patients showed complete and eighteen patients showed incomplete lesion. Eight patients with incomplete lesion and one patient with complete lesion were followed up. Seven patients with incomplete lesion showed regeneration between 1∼7 months after injury. Therefore electrodiagnostic study is necessary to evaluate severity and level of nerve lesion and regeneration.