Lung cancer is known as a disease leading to metastases to all types of organs. Although covering a large part of the body and of much blood building-up, skeletal muscles are rare metastatic areas. In autopsies, less than 1% of malignant cancers that are spread hematogenously is known to lead to metastasis. A 51-year- old male patient diagnosed with squamous cell lung cancer and known to be in regression via screening after the administration of 32-day curative radiotheraphy and 6-cycle chemotherapy, the patient was radiologically followed-up. Four months later, he was admitted to outpatient clinic with the complaint of left hip pain. Magnetic resonance imaging revealed a lesion of nodular, necrotic metastatic mass within left gluteus muscles. As a result of tru-cut biopsy performed for the solid lesion, metastasis of carcinoma was detected. As also in our case, metastatic muscle disease should be suspected in patients with muscle pain.