Royal Noble Consort Hui of the Indong Jang clan (Korean: 희빈 장씨; Hanja: 禧嬪 張氏; 3 November 1659 – 10 October 1701), personal name Jang Ok-jeong (장옥정; 張玉貞), was a consort of Sukjong of Joseon and the mother of King Gyeongjong.

While visiting Queen Jaui, the King became infatuated with Ok-jeong's beauty and gave her the rank of Seungeun Sanggung (or Favored Sanggung; 승은 상궁), but his mother, Queen Dowager Hyeonyeol, who belonged to the Seoin faction, feared that Jang Ok-jeong would influence him to favor the Namin, so she expelled her from the palace.

[1][2] In that same year, Lady Jang was promoted to Bin (빈; 嬪), the highest rank for a consort, with the prefix Hui (禧), which means "beautiful".

In 1693, Sukjong's new favorite, a palace maid from the Haeju Choe clan, was officially elevated to a royal consort of the Sug-won rank.

In the government, the Namin faction's attempt to purge the Seoin on the charge of plotting to reinstate the deposed Queen backfired.

He officially demoted Jang Ok-jeong to her former position, Hui-bin, and reinstated the Deposed Queen Min.

Allegedly, Sukjong discovered Lady Jang conspiring with a shaman priestess to curse the Queen with black magic and gloating over her death.

Her tomb is called Daebinmyo and was originally located in Gwangju, Gyeonggi Province, but in June 1969 it was moved to the Seooneung Cluster, in Deogyang District, Goyang, Gyeonggi Province, near Myeongneung, which contains the tombs of King Sukjong and two of his wives, Queen Inhyeon and Queen Inwon.

Some Korean websites report that because Lady Jang was such a strong woman there is a belief that if young, single women who want a boyfriend visit the tomb and pay a tribute, they will soon find love.