Captain Eitan Shmuel Lemberg, aged 21, from Mishmar HaShiv'a, was killed in combat in southern Lebanon, the IDF announced on Thursday.
Lemberg was an officer in the armored corps of the 75th Battalion, 7th Brigade.
According to Army Radio, Lemberg was killed when a Hezbollah terrorist fired an anti-tank missile at an IDF tank north of the Litani River.
Immediately after the incident, the Israeli Air Force and ground forces using artillery struck at Hezbollah infrastructure in the area.
Four IDF soldiers killed in one week
Lemberg is the fourth Israeli soldier to have been killed in less than a week.
On Monday, the IDF announced that two soldiers had been killed in southern Lebanon: Captain Doctor Ori Yosef Silvester was killed in combat, while Staff-Sergeant Adam Tzarfati was killed in a Hezbollah drone explosion.