Yangjaecheon (Korean: 양재천) is a stream that flows through the city of Seoul, South Korea.

Yangjaecheon is a greenway stretching five and a half kilometres from Gwanaksan in Gyeonggi through the Seocho, Gangnam, and Songpa districts until it feeds into the Tancheon.

[1] The stream is recessed, with major and minor roads above it on bridges and multiple parallel bike and pedestrian trails flanking it on tiered ledges.

Public exercise equipment is provided along the stream, as well as benches and a variety of flowers.

The vegetation revetments act as safeguards against floods and control the water temperature by creating shade.

The Yangjaecheon also provides fish and algae habitats to help maintain the food chain of aquatic ecosystems.

As a result of these efforts, the Yangjaecheon was selected by the Ministry of Environment in 2005 as an excellent ecological restoration river.