Queen Myeongui of the Chà Ângju Yu clan (; d. 8 August 1112) was a Korean queen consort as the first and primary wife of King Sukjong of Goryeo and the mother of most of his children.
She married Sukjong when he was still known as Duke Gyerim (). Before 1079, she was given royal title as Princess Myeongbok () while living in Myeongbok Palace and later changed into Princess Yeondeok () when she moved to Yeondeok Palace. Her mother, Lady Kim was formally called as "Grand Lady of the Nakrang State" ().
Then, following her husband who ascended the throne as a King, she become a Queen Consort in 1099. But, in the Goryeosa, there was some misunderstanding because her name after becoming a queen consort, her clan name was written as Yi clan () which wasn't her clan.
However, on 10 November 1105, her husband passed away and their oldest son, Wang U ascended the throne as Yejong of Goryeo those making Yu honoured both as Queen Mother () and Grand Queen Mother () in 1105. Beside Yejong, she bore Sukjong 6 other sons and 4 daughters. After that, she was given Sungmyeong Mansion () in Cheonhwa Hall () as her residence and affiliated institution. As a queen dowager, her birthday was also specially celebrated.
On 8 August 1112, the queen dowager caught an illness and died suddenly after went to recuperation outside the palace at her old age in Sinbak Temple. On 8th month (Lunar calendar) in the same year, she was buried in Sungneung Tomb () and received her posthumous name.
During her funeral, the Liao dynasty sent their envoys to mourn. But, seeing this, the internal court said:
("ìÂÂê¸ÂëÂÂ, ì¤ë¤ë¤ì´ ÃÂÂÃÂÂë ì Âì¬ ì§Âë´ë¬ ì¨ ê±´ ì´ë²Âì´ ì²Âì ìÂÂëÂÂê°ÂìÂÂ? ì¸êµÂ(é£åÂÂ)ì´ ì´ë° ìÂÂì°(禮)를 ë³´ì¬ì¤Â걸 ì¶ÂÃÂÂëÂÂ립ëÂÂë¤!").