MMANiagara.com

Despite popular belief MMA is not a style, but a sport fighting competition and training methodology that allows two trained fighters to battle under a set of rules using any number of techniques from the stand-up striking styles to clinching, throwing and finally groundfighting styles.
As such, fighters in MMA train in striking and groundfighting techniques pulled from a number of disciplines – Brazilian Jiujitsu being one of them.

Brazilian Jiujitsu is a groundfighting style originated by the Gracie family of Brazil, that has evolved into being widely used for MMA competition. It is a full blown style that has it’s own history, techniques, culture, competitions, etc.

The birth of MMA competition in the US began when Rorion Gracie, along with Art Davie and Rob Meyrowitz founded the first Ultimate Fighting Championship. Rorion’s brother, Royce, dominated the early UFCs using Brazilian Jiujitsu.

Different. MMA incorporates many martial arts. Jiu Jitsu is just one of the martial arts involved.

MMA is a group of martial arts (including jiu jitsu) that is used in the UFC or other fighting groups. MMA also includes all the eastern martial arts boxing etc..

MMA is a mix of any art like fighters can have their own styles anything from judo, to Jiu Jitsu, Karate and Muy Thai…MMA is just a mix of that all in one its more of a type of combat over a martial art thats why its called Mixed Martial Arts…Brazilian Jiu Jitsu is just one of those arts

Brazilian Ju Jitsu is grappling, on the ground.
You use your body to bend or choke theirs, easiest i can put it.

MMA Is a mix between a few different standing and slight ground fighting marital arts.

MMA is exactly what it says, Mixed! In MMA you have fighters who have studied several different styles taking the best from each style. Such as taking the punching from boxing and the kicks from taekwandoo. In Brazilian Jiu Jitsu (which I am studying at the moment) is mainly grappling and ground work. When I say ground work I’m talking about the arm bars, the chocks, and the sweeps. Also, there’s also some take downs. Brazilian Jiu Jitsu is not a striking style. Striking can be incorporated into the style though.

They are different. MMA is a training/competition format. BJJ is a martial arts system. BJJ is a grappling system with a specific lineage, that involves training with a gi and focuses on ground attacks. MMA usually involves training in BJJ (although there are exceptions: Fedor Emelianenko, Karo Parisyan, Josh Barnett), but also includes training in other disciplines, such as boxing, Western wrestling, Judo, Muay Thai, Taekwondo, and so on. MMA competitions do not usually involve a gi, and the emphasis is on equal parts striking and grappling.