胸廓（英語：thoracic cage）又稱肋廓（rib cage）、肋骨籠，是多數脊椎動物胸部由胸椎、肋骨、胸骨構成的骨質支架。由胸廓圍成的空腔稱為胸腔。胸廓可以保護胸腔內的心、肺等重要器官。
人類的胸廓由12塊胸椎、12對肋骨和肋軟骨以及1塊胸骨（包括胸骨柄、胸骨體和劍突三部分）構成。
參考文獻
- Orientation of the intercostal muscle fibers in the human rib cage, Subit D., Glacet A., Hamzah M., Crandall J., Computer Methods in Biomechanics and Biomedical Engineering, 2015, 18, pp. 2064–2065
- Clinically Oriented Anatomy, 4th ed. Keith L. Moore and Robert F. Dalley. pp. 62–64
- Principles of Anatomy Physiology, Tortora GJ and Derrickson B. 11th ED. John Wiley and Sons, 2006. ISBN 0-471-68934-3
- De Humani Corporis Fabrica
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