The Hakkari Governor's Office said in a statement that the clash erupted while Turkish troops were conducting an operation against the terrorist organization in the village of Ortaklar in Şemdinli.
Some 20 PKK terrorists also died during the clash, authorities said. Military operations against the terrorist organization in the region are ongoing, assisted by fighter jets.
Another Turkish soldier was killed on Sunday in a bomb attack orchestrated by the PKK in the southeastern province of Şırnak. The blast occurred during the course of a military operation by Turkish security forces on Mount Kato in the province's Beytüşşebap district.
Fighting between the military and the PKK has intensified in recent months, a development that some Turkish officials and analysts have linked to the chaos in neighboring Syria.
Listed as a terrorist organization by Turkey, the EU and the United States, the PKK has been waging a bloody war in Turkey's Southeast since 1984. More than 40,000 people have been killed in the conflict between the terrorist PKK and Turkish forces since the PKK launched its fight with the aim of establishing a separate Kurdish state in the predominantly Kurdish Southeast.