The xiphisternal joint (or xiphisternal symphysis) is a location near the bottom of the sternum, where the body of the sternum and the xiphoid process meet. It is structurally classified as a synchondrosis, and functionally classified as a synarthrosis.^{[citation needed]} The joint usually ossifies by the fourth decade of life,^[1] forming a synostosis.^{[citation needed]}

It is in line with^{[clarification needed]} the T9 vertebra.^{[citation needed]}