| Grand Prince Jinan 진안대군 | |
| Spouse-Type: | Spouse(s) |
| Dynasty: | House of Yi |
| House: | Jeonju Yi clan |
| House-Type: | Clan |
| Father: | Taejo of Joseon |
| Mother: | Queen Sinui |
| Birth Name: | Yi Bang-u (이방우, 李芳雨) |
| Birth Date: | 1354 |
| Birth Place: | Heungseok-ri, Yeongheung-myeon, Hwaryeong County, Hamgyeong Province, Goryeo |
| Death Place: | Hamhung, Dongbok-myeon, Joseon |
| Korean name | |
| Hangul: | 진안대군 |
| Rr: | Jinan Daegun |
| Mr: | Chinan Taegun |
| Hangulborn: | 이방우 |
| Rrborn: | I Bangu |
| Mrborn: | Yi Pangu |
| Hangulph: | 경효 / 정의 |
| Hanjaph: | / |
| Rrph: | Gyeonghyo / Jeongui |
| Mrph: | Kyŏnghyo / Chŏngŭi |
| Othername1: | Art name |
| Hangul1: | 청덕 |
| Rr1: | Cheongdeok |
| Mr1: | Ch'ŏngdŏk |
Grand Prince Jinan (; 1354 – 15 January 1394), personal name Yi Bang-u or Lee Bang-woo, was a nobleman during the late Goryeo dynasty who become a prince of Joseon as the first son of King Taejo and Queen Sinui.
He became the general secretary of the last king of Goryeo dynasty. In year 1388, his father, King Taejo, overthrew Goryeo dynasty. After witnessing this incident, he went to Bogae mountain in Chelwon to retire. Later on, he went to Hamheung, which is located in present-day North Korea; there, he died at the age of 40.
In 1392, when King Taejo was giving out titles, his first son became as known as Grand Prince Jinan.
In the annals of Joseon dynasty, it describes Grand Prince Jinan as a man who liked alcoholic beverages, and states that he drank copious amount until he died.However, according to a memorial stone of Grand Prince Jinan, which was made in 1789, "Grand Prince Jinan was an exemplary son to his parent, who took good care of his brother and sisters. When he grew older, he minded in literature and practiced humble life style and did not fancy wealth nor authority.”
Consorts and their respective issue(s):