This study aims to present underwater diving tourism and aims to reveal the various aspects of the coast in Kaş and Demre districts. The coasts of Kaş and Demre districts, where underwater diving tourism shows the most important development in our country, also lead the diving tourism. The coasts of the region have the most important dive sites on our shores with both Dalmatian type coasts and underwater geomorphology and marine flora and fauna, sunken and artificial reefs. In the paper; geographical factors that affect underwater diving tourism on the coasts of Kaş and Demre districts, characteristics of dive sites, attracting factors, development of diving tourism and the magnitude of the mobility it creates were investigated. In this study, both the problems affecting the underwater diving tourism negatively on the coasts of the region and the problems caused by diving tourism are examined. Finally; suggestions were made for the development of the balance of protection and use in order to ensure sustainability in underwater diving tourism on the coasts of Kaş and Demre districts. The data required for the study was collected in July 2018 and May 2019 through interviews with dive school officials, dive instructors and especially recreational divers, as well as field studies. Research was supported by document analysis.