Chondrosarcoma is a malignant mesenchymal tumor originating from cartilage and it produces cartilage matrix. The cartilage of the pelvis and long bones most frequently affected sites. Posterior mediastinum is a rare localization for chondrosarcoma. The symptoms of posterior mediastinum chondrosarcoma are nonspecific. Also, the differential diagnosis of posterior mediastinal masses is extensive. Therefore, radiological imaging plays an important role in the diagnosis. In this report, a case of chondrosarcoma originating from posterior mediastinum was presented with imaging findings.