Jang Hye-ock (Korean: 장혜옥; Hanja: 張惠玉; born 9 February 1977) is a badminton player from South Korea who affiliate with Chungnam Provincial office team.

[1] She won the gold medal at the 1995 IBF World Championships in women's doubles, playing with Gil Young-ah.

[3] Jang competed at the 1996 Summer Olympics, and she won the silver medal in the women's doubles together with Gil Young-ah.

Jang Hye-ock entered the national team in 1993 when she was in the second grade of Seongshim Girls' High School.

In February 1996, she undergo surgery for an enlarged rib and after recovered her injury, she competed at the 1996 Summer Olympics, won a silver medal in the women's doubles with Gil Young-ah.