| Petros Kokkalis | |
| Birth Date: | 18 September 1896 |
| Birth Place: | Livadeia, Greece |
| Death Place: | East Berlin, German Democratic Republic |
| Occupation: | Physician, surgeon, professor |
| Office1: | Secretary of Health and Social Welfare in the Provisional Democratic Government |
| Term Start1: | 1947 |
| Term End1: | 1949 |
| Alma Mater: | University of Athens Humboldt University of Berlin |
| Party: | Communist Party of Greece |
| Parents: | Socrates Kokkalis (1856–1944) Polyxeni Nakou (1866–1937) |
| Spouse: | Niki Kouletsi |
| Children: | Socrates Kokkalis Avgi-Polyxeni Kokkalis |
| Relatives: | Petros S. Kokkalis (grandson) |
| Known For: | Advances in thoracic surgery; pioneering heart and lung transplantation |
Professor Petros Kokkalis (Greek, Modern (1453-);: Πέτρος Κόκκαλης, 18 September 1896 – 15 January 1962) was a distinguished professor of Medicine in the University of Athens has been one of the leading figures of Medicine in pre WWII Greece, introducing pioneering methods in thoracic surgery and neurosurgery. His main medical achievements include the introduction of thoracoplasty in Greece and removal of the phrenic nerve for the treatment of tuberculosis, as well as the first pneumonectomy with the Tourniquet method and the first pericardiectomy for the release of compressive pericarditis.[1] [2]