The Ministry of Health in the Gaza Strip announced the death of Anas Khaled Inshasi at Nasser Medical Complex in Khan Yunis, where he was receiving treatment for injuries.
Seventeen children were among those killed, while more than 360 people were injured.
A week ago, the Tel Aviv Armed Forces began to bomb alleged targets of the Islamic Jihad group, which responded with barrages of rockets against the territory of the neighboring nation.
After 66 hours of attacks, both sides reached a truce mediated by Egypt.
Following the end of the conflict, stores and ministries reopened on Monday, in the territory with more than two million inhabitants.