張己任（1945），指揮家。出生於廣東省平遠縣。1952年隨家人到臺。9歲開始學鋼琴，15歲於臺灣省鋼琴比賽中獲獎。1973年以特優成績畢業於美國紐約曼尼斯音樂學院，同年獲紐約市立歌劇院總監魯德爾之指揮獎。1978年獲全額獎學金赴紐約市立大學博士班，專攻音樂學和音樂理論。1981年轉入哥倫比亞大學，1983年以《齊爾品對現代中國音樂的影響》獲博士學位。回臺後，於1990-1998年曾任東吳大學音樂學系系主任，東吳大學學生事務長（1996-1998、2000-2006）；張已任1981年曾於紐約寓所舉辦江文也音樂會，1992年任《江文也的音樂手稿集》、《江文也的文字作品集》及《江文也紀念研討會論文集》之總編輯，對於江文也之發現，貢獻良多。代表著作有《西洋音樂風格的演變 — 中古至文藝復興》、《江文也傳》、《音樂之美》等。2018年，獲中華民國107年榮譽文藝獎章音樂類。

CHANG Chi-Jen (b. 1945) conductor. Born in Pingyuan County, Guangdong Province, he moved to Taiwan with his family in 1952. He began studying piano at age nine and won an award in the Taiwan Provincial Piano Competition at age fifteen. In 1973, he graduated with honors from the Mannes School of Music in New York, and in the same year, he received the Conducting Award from Julius Rudel, Director of the New York City Opera. In 1978, he was awarded a full scholarship to the doctoral program at the City University of New York, specializing in musicology and music theory. He transferred to Columbia University in 1981 and earned his doctorate in 1983 with his dissertation, Alexander Tcherepnin's Influence on Modern Chinese Music. Upon returning to Taiwan, he served as the Chair of the Department of Music at Soochow University (1990–1998) and as the Dean of Student Affairs (1996–1998, 2000–2006). In 1981, Chang organized a concert for Jiang Wen-ye at his residence in New York. In 1992, he served as the editor-in-chief for The Musical Manuscripts of Jiang Wen-ye, The Collected Literary Works of Jiang Wen-ye, and The Proceedings of the Jiang Wen-ye Memorial Seminar, contributing significantly to the discovery and study of Jiang Wen-ye. His representative works include The Evolution of Western Musical Style: Middle Ages to Renaissance, The Biography of Jiang Wen-ye, and The Beauty of Music. In 2018, he was awarded the Honorary Literary and Art Medal (Music Category) of the Republic of China.