Lee Joo-bin (; born September 18, 1989) is a South Korean actress and model. She is best known for her roles in Be Melodramatic (2019), Hello Dracula (2020), Find Me in Your Memory (2020), She Would Never Know (2021), Doctor Lawyer (2022), ' (2022), and Queen of Tears (2024). Her first lead role was in The Divorce Insurance (2025).
Lee is a former DSP trainee who almost debuted as a member of the girl group Rainbow in 2009. Lee left DSP Media after deciding she did not want to pursue a career as a singer and felt she was too old to become an idol. She later appeared in KBS's weekend drama My Only One, alongside Go Woo-ri from Rainbow.
Lee starred in the TvN romantic-comedy series Spring Fever opposite Ahn Bo-hyun in 2026. It is based on the web novel of the same name by Baek Min-a, about a woman who leaves Seoul after a heartbreak and meets a man who changes her life. Lee played the protagonist Yoon Bom, a small-town teacher.