Namdaemunno (Korean: 남대문로), also known as Namdaemun-ro, is a major thoroughfare in the central districts of Seoul, South Korea and a two-way road consisting of 8 lanes.

With a 2 km length and a 40~50m width, Namdaemunno originates at Bosingak in Jongno District and terminates at Seoul Station in Jung District.

[1] Historical buildings on this street include the Gwangtonggwan, the oldest continuously operating bank building in Korea.

[2] It was registered as one of city's protected monuments on March 5, 2001.

[3]