Eosal refers to the traditional Korean fishing technique of setting a fish trap made from bamboo stakes or stacked stones in the intertidal zone to capture fish as the tide recedes. It also refers to the equipment used in this fishing method.

Fishing with weirs has a long history in Korea, with relevant records found in Goryeo Dynasty documents such as Samguk sagi and Goryeosa. The natural process of geological transformation in the coastal areas of Korea met with a surge in the demand for fish amid an expansion of commerce that took place in the 16th–17th centuries, giving rise to diverse variants of the eosal method (such as jubeok on the western coast and bangnyeom and jangsal on the southern coast). Eosal holds an important position in the fishing history of Korea.

Eosal served as the foremost coastal fishing method during the Joseon Dynasty. The prevalence of the practice of eosal during the Joseon era is confirmed by its appearance in the late-Joseon album of genre paintings created by the renowned court painter Kim Hong-do (1745–after 1806). Eosal and other traditional fishing methods declined, however, from the 1970s with the advancement of coastal fishing boats. There are still places on the southern coast where eosal is practiced, such as in the Jijok Strait in Namhae County and near Mado Island and Jeodo Island in Sacheon City.

The traditional eosal fishing method embodies a profound knowledge of the ecological environment and changes in seasons and tidal flows. It is an important factor for studying the culture and history of fishing villages and folklife in general. In addition, it has transformed into various types of net fishing devices still used today. Recognizing these values, eosal has been designated as National Intangible Cultural Heritage.

* As eosal forms part of the customary knowledge of Korean fishery workers across the nation, no particular holders or holder groups have been recognized for this element.
* The term eoryang (魚梁) was preferred until the early Joseon period (as seen in the early-Joseon compilations Sejong sillok jiriji and Sinjeung dongguk yeoji seungnam), after which eosal (漁箭) became prevalent.
* Jubeok (jumongmang 柱木網): In the shallow areas off the western coast, two to three wooden stakes are installed and one or two large nets are suspended between them to catch croaker and other fish.
* Bangnyeom (防簾): Wooden posts are erected and secured by tying heavy stones to their lower ends. In between the wooden posts closely spaced bamboo stakes are set.
* Jangsal (杖矢): Wooden posts are used as in bangnyeom, but nets replace the bamboo stakes.