Frozen shoulder is known to be a self-limited disease, and it is associated with chronic pain and limitation of joint movement. Although its etiology is still unknown, frozen shoulder is associated with several diseases. The diagnosis is made based on the medical history, the clinical and radiological examinations and exclusion of other shoulder pathologies. The skeleton is one of the most common sites of metastasis in patients with lung cancer. It has been reported that the incidence of bone metastases in lung cancer patients is approximately 30?40%, and the median survival time of patients with such metastases is 6?7 months. We experienced a case of a 77-year-old female patient who complained of right shoulder pain and limited joint mobility, and these symptoms were due to metastatic lung cancer in the shoulder. (Korean J Pain 2008; 21: 164-167)