In the anime, Gaara's sash is white. In the manga, Gaara's sash is red.
The clouds that cover Naruto's breasts when he uses Sexy No Jutsu are smaller in the manga than in the anime.
Ino, Shikamaru and Chouji followed in their fathers' footsteps to become teammates and practice the InoShikaCho formation. The InoShikaCho formation is also a technique from a card game.
There once was a Japanese priest who supposedly enchanted a teapot to never be empty at a party and was believed to be a tanuki. His name was Shukaku. Gaara's tanuki demon is named Shukaku.
There was a short manga called Karakuri that was the prequel to the manga Naruto, which predecessed the anime. In Karakuri, Naruto actually is a demon fox.
Kabuto, Yoroi and Tsuguru are all on a team in Naruto during the Chuunin Exam. Their names mean, from left to right, Helmet, Armour and Sword, appropriate gear for a ninja.
The scene where Konohamaru and Naruto go into an adult magazine store for 'inspiration' was never in the manga.
The arc that included Morino Idate was never in the manga.
The names of the three Sannin (Jiraiya, Tsunade, and Orochimaru) were taken from the "Legend of the Gallant Jiraiya" each of whom had a special magic they learned - toad, slug, and snake.
The character Kankuro of the Sand Nation is named after a famous Kabuki actor and is a common name for crows. The character Kankuro uses puppets as his weapon against opponents, puppets were widely used in Bunraku theater. Kankuro's outfit is that of a typical Bunraku puppeteer. The most well known of his puppets is named "Crow".
The reason the ninjas all wear protective headbands is because Naruto originally wore goggles (first episode), but the artist of the manga thought it took too long to draw the goggles, so he replaced them with the forehead protector.
The often line "Dattebayo" that Naruto repeat in dialogs is changed in the English version as "Believe It". Also, in the Spanish version, is changed to "De veras"
[repeated line]
Naruto Uzumaki:
I'm not going to take back my words. That's my way of the ninja!
Kakashi:
[about Sasuke's new technique] You'll wet your pants.
Rock Lee:
A dropout will beat a genius through hard work.
Kakashi:
[introducing himself to his students for the first time] I am Hatake Kakashi. I have no intentions of telling you my likes and dislikes. As for my dream... I have few hobbies.
Naruto Uzumaki:
Believe it!
Kakashi:
Uh, Naruto, your speech was cool and all, but if you lose any more blood, you're going to die.
Sakura:
NARUTO RUN... YOU'RE GONNA GET KILLED.
Kakashi Hatake:
Too late... Konoha's hidden village secret taijutsu technique
[sticks fingers in Naruto's butt]
Kakashi Hatake:
ONE THOUSAND YEARS OF PAIN!
Naruto Uzumaki:
GYAAAAAAAAAAAAAAAAAAAAH!
Naruto Uzumaki:
[When Naruto falls for an obvious trap and is struggling about. Kakashi is telling him that a ninja must see through deception] I get it I get it!
Kakashi:
No, you don't get it, thats why I'm telling you. You think you get it, which isn't the same as actually getting it. Get it?
Gaara of the Desert:
Shut up... or I'll kill you.
[after Haku appearingly kills Sasuke]
Naruto Uzumaki:
I won't forgive you!
[the Nine Tails chakra bursts out of him]
Naruto Uzumaki:
I'll rip you apart!
Itachi Uchiha:
[to Sasuke] Foolish little brother... If you wish to kill me, curse me! Hate me! And survive your miserable life... Run away, run away... Cling to life.
Gaara of the Desert:
[mentally speaking to his 'mother' during the Chunnin Tournament]
[fansub version]
Gaara of the Desert:
Yeah... I'm going to tear him apart. Then drag it out... What, you ask? The insides, of course. A lot comes out, right?
[chuckles]
Gaara of the Desert:
I'll give them all to you. I'm always a good boy. Yes, let's do it. Mom, I'll watch.
Factual errors: It's impossible to do the monkey's seal because it need two left hands.
Followed by
Naruto Movie 1: Daikatsugeki! Yukihime ninpôchô dattebayo!! (2004)