|This article is about a/an transformation device in Kamen Rider Fourze.|
The Fourze Driver (フォーゼドライバー Fōze Doraibā) is Kamen Rider Fourze's transformation belt that was given to Gentaro by Kengo Utahoshi. To transform into Fourze, Gentaro first inserts four Astroswitches into the Switch Sockets (スイッチソケット Suitchi Soketto) if they aren't there already, and flips the red Transwitches (トランスイッチ Toransuichi) down, turning on the Status Monitor (ステイタスモニター Suteitasu Monitā) with each thrown Transwitch, to begin the countdown. Afterwards, he pushes the Enter Lever (エンターレバー Entā Rebā) on the side of the belt and raises his right arm in the air.
By switching on a correspondent Astroswitch, or a combination of Astroswitches, before pushing the Enter Lever again, Fourze can perform a Limit Break (リミットブレイク Rimitto Bureiku) finishing attack.
While executing a Double Limit Break is possible, it is risky as it would completely drain an Astroswitch's power for a while, rendering one of them useless until they are completely recharged.
The Fourze Driver was invented by the father of Kengo Utahoshi, based on his research in Cosmic Energy. The Circle, Cross, Triangle, and Square Basement designs were based off of the pillars in Kyoto, where Utahoshi and his team researched the Hole over the city.
5 years later, Gentaro used the Fourze Driver once again to fight alongside Riders old and new against Foundation X. Not long after, Gentaro, in a last attempt to persuade Sanagiman to redeem himself, ultimately destroyed the belt by throwing it into a vat of molten steel at a factory as a sign of truce, his act was understood and accepted by Kengo.
He later borrows the Fourze Driver from his present day self to fight alongside Wizard. After the future Gentaro returns to his own time, Haruto gives the Driver back to the Gentaro of the present. Afterwards, as the rest of Kamen Rider Club lamented its destruction, Kengo was certain that, as the Fourze Driver was Gentaro's friend, it would always return when it was truly needed.
- Fourze can access his other States without changing into Base States. It was done by activating the switch before transforming. It was first used in the first fight against the Sagittarius Zodiarts by transforming straight into Cosmic States, in order to protect the critically injured Tachibana.
- The Fourze Driver is also donned by Mitsuki Endo of Kamen Rider Girls, who represents Fourze in the group.
- Unless future events change the circumstances, this is the first time in the franchise that a main Rider's Belt has been permanently destroyed willingly by its user.
- However, the Driver appears again in Kamen Rider Heisei Generations FINAL: Build & Ex-Aid with Legend Riders. Though the movie is said to take place before the 2017 events in Kamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum, the assistant director has admitted that he forgot the Fourze Driver had been destroyed. 
|Kamen Rider Fourze|
|Gentaro Kisaragi - Ryusei Sakuta - Nadeshiko Misaki* *(Movies only)|
|Fourze Driver - Meteor Driver- Nadeshiko Driver - Astroswitches - Astroswitch Case - Elek Module Billy the Rod - Fire Module Hee-Hackgun - NS MagPhone - Meteor Galaxy - Cosmic Module Barizun Sword - Meteor Storm Shaft - Machine Massigler - Machine Meteorstar - Powerdizer|
|Kamen Rider Club|
|Yuki Jojima - Kengo Utahoshi - Miu Kazashiro -Shun Daimonji -Tomoko Nozama -JK - Chuta Ohsugi|
|Other Ishinomori Heroes|
|Inazuman* - XVII*|
|The Horoscopes: Sagittarius - Virgo - Leo - Libra - Scorpio - Cancer - Aries - Capricorn - Aquarius - Taurus - Gemini - Pisces|
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