Jang Si-hwan (born November 1, 1987) is a South Korean professional baseball pitcher for the Hanwha Eagles of the KBO League. He has also played for the Hyundai Unicorns, the Nexen Heroes, and the Lotte Giants.
On November 21, 2019, he and Kim Hyun-woo, who were then members of the Lotte Giants, and Kim Joo-hyun and Ji Sung-joon, who were members of the Hanwha Eagles, moved to a 2:2 trade.