Chuzi (Chinese: 出子; pinyin: Chūzǐ; 708–698 BC), also sometimes called Duke Chu of Qin (Chinese: 秦出公), was from 703 to 698 BC the ninth ruler of the state of Qin during the Zhou dynasty in ancient China. His ancestral name was Ying (嬴), and Chuzi was his posthumous name. He was the first of two child rulers of Qin called Chuzi.