| Agency Name: | General Department of Defence Intelligence |
| Nativename: | Vietnamese: Tổng cục Tình báo quốc phòng |
| Nativename A: | Tổng cục II |
| Seal: | Tổng cục Tình báo Quốc phòng.svg |
| Preceding1: | Military Intelligence Division (1946-1947; 1957-1995) |
| Preceding2: | Intelligence Agency (1947-1950) |
| Preceding3: | Communication Department (1951-1957) |
| Parent Department: | CPV CMC |
| Parent Agency: | SRV MoD |
| Jurisdiction: | Vietnam People's Army |
| Headquarters: | Bắc Từ Liêm District, Hanoi |
| Employees: | ~25.000 |
| Budget: | Classified |
| Chief1 Name: | Phạm Ngọc Hùng |
| Chief1 Position: | director general |
| Chief2 Name: | Lê Quang Minh |
| Chief2 Position: | Commissar |
| Chief3 Name: | Đặng Vũ Chính |
| Chief3 Position: | 1st Deputy Director |
The General Department of Defence Intelligence (GDDI;, sometimes,),[1] also recognized by its internal designation General Department II (- TC2),[2] is a general department -level agency under the Vietnam Ministry of Defence and the strategic military intelligence service of the Vietnam People’s Army, which practically being the biggest existing intelligence body under the Vietnamese government. GDDI is intended to directly carry out intelligence activities at the strategic level, meanwhile serving as the advisory organ for the Minister of National Defence and the General Chief of Staff to consult on the force organization and intelligence operations. It is the lead department directly responsible for instructing and guiding the army’s military intelligence and reconnaissance network in terms of professional intelligence in Vietnam.[3]
GDDI commissions at least three formal combatant brigades, being field reconnaisance formations.[4] Designated as the special reconnaissance forces, they are capable of conducting dedicated frontline military offensive operations as well as infiltration campaigns serving the Vietnamese interests. A majority of GDDI's characteristics and organization is not formally publicized.