Hyeminseo (Korean혜민서; Hanja惠民署; MRHyeminsŏ) was the medical authority of the Joseon Dynasty in Korea. The officers were in charge of the treatment of commoners and medicine.

In 1392, the year of the foundation of Joseon, the organ was established to succeed the Hyemingoguk (혜민고국; 惠民庫局), the former medical institution of Goryeo. In 1414, its name became Hyeminguk (혜민국; 惠民局), and then finally changed to the name Hyeminseo in 1466 under the reign of Sejo of Joseon. It was abolished in 1882.

The officers were in charge of producing medicines, teaching disciplines, researching Korean medicine. Generally, four people were put to as the disciplines. Bureaucrats of Hyeminseo were also appointed through the gwageo recruitment examination.

Hyeminseo aimed to benefit the people but its coverage was limited to commoners living in Hanyang (now Seoul). There was another medical authority called Hwarinseo (활인서; 活人署). Collectively, the two were referred to as Yanguisa (양의사; 兩醫司; lit. "the two medical authorities").