Lai Junchen (Chinese: 來俊臣) (died April 28, 697) was a Chinese politician and writer. He was a well-known secret police official during the Chinese Tang and Wu Zhou dynasties, whose ability to interrogate and falsely implicate officials of crimes made him a subject of fear and hatred. In 697, he was accused of plotting to falsely accuse Wu Zetian's sons and other family members of treason, and he was executed.