King Huiwen of Qin

Full name
	Family name: Ying (嬴); Given name: Si (駟) or Yin (駰);
Posthumous name
	King Huiwen (惠文王); or; King Hui (惠王)

King Huiwen of Qin
秦惠文王
King Huiwen of Qin; 秦惠文王
Reign	338–311 BC
Predecessor	Duke Xiao of Qin
Successor	King Wu of Qin
Born	356 BC
Died	311 BC (aged 44–45)
Spouse	Queen Huiwen; Queen Dowager Xuan;
Issue	Tong, Marquis of Shu; King Wu of Qin; King Zhaoxiang of Qin; Yun, Marquis of Shu; Shi, Lord Gaoling; Kui, Lord Jingyang; Queen Yi of Yan;
Full name
Full name
	Family name: Ying (嬴); Given name: Si (駟) or Yin (駰);
Posthumous name
	King Huiwen (惠文王); or; King Hui (惠王)
House	Ying
Dynasty	Qin
Father	Duke Xiao of Qin

King Huiwen of Qin (Chinese: 秦惠文王; 356–311 BC), also known as Lord Huiwen of Qin (Chinese: 秦惠文君), personal name Ying Si, was a king of the state of Qin during the Eastern Zhou dynasty, reigning from 338 to 311 BC. He was the first ruler of Qin to style himself "King" (王) instead of "Duke" (公).