Rock Lee (ロック・リー, Rokku Rī) is a shinobi of Konohagakure's Lee clan and a member of Team Guy. Unlike most shinobi, he lacked the skills necessary to use ninjutsu or genjutsu. However, he overcomes those shortcomings by undergoing special training from Might Guy that would make him a taijutsu master while still a genin.

Lee has shiny black hair, round eyes with prominent lower eyelashes, and very thick eyebrows; as a result, Naruto calls him "Centipede Brows" (ゲジマユ, Gejimayu, English TV: Bushy Brows). As a child, his hair was quite long and fastened in a braid, though he cuts it short by the time he joins Team Guy, letting it curve out and upward. Lee originally wore a white, short-sleeved kimono-shirt with a martial arts belt and dark pants, giving him a more traditional Chinese appearance. He also sported a forehead protector and shinobi sandals.

Lee later changes his appearance considerably to emulate his idol and sensei, Guy: his hair is now in a bowl-cut style; he wears a green jumpsuit, orange leg warmers, and a red forehead protector worn as a belt. He has bandages around his forearms up to his fingers, covering a set of stitches on his hands that were caused by his rigorous training. Like Guy, Lee's appearance remains largely the same over the years, though he adds a standard Konoha flak jacket as a chūnin in Part II, and its redesigned version in The Last: Naruto the Movie. As an adult, Lee grew noticeably muscular with more-defined cheekbones, and now wears a sleeveless jumpsuit with an orange neckwarmer.