Shin Jae-ha (신재하; born April 2, 1993, in Suwon, South Korea) is a South Korean actor recognized for his versatility in balancing innocent, youthful roles with complex, highly acclaimed antagonist performances. Since making his debut in 2013, he has consistently demonstrated stable and earnest acting, making him a highly sought-after talent in K-dramas.

He built his early career through supporting roles in popular dramas, often portraying younger versions of lead characters or students, such as the younger Ki Jae-myung in Pinocchio (2014) and Seo Jin-mok in the short series Page Turner (2016). His presence was further established through memorable supporting turns in major series like While You Were Sleeping (2017) and the smash-hit black comedy Prison Playbook (2017–2018).