Jun Maeda (麻枝准, Maeda Jun, born January 3, 1975) is a Japanese writer and composer. He is a co-founder of the visual novel brand Key under Visual Arts. He is considered a pioneer of nakige visual novels, and has mainly contributed as a scenario writer, lyricist, and musical composer for the games the company produces.

After graduating with a degree in psychology from Chukyo University, Maeda contributed to the scripts and scores of games released under the Tactics brand of Nexton: Moon and One: Kagayaku Kisetsu e. He has contributed both to writing music and scripts to most games released under the Key brand, notably writing the majority of Air and Clannad. He also served as a screenwriter and composer for several anime series produced by P.A. Works, such as Angel Beats! and Charlotte.