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Yes, as per Ryan's comment you can just take an infinite direct sum of finite groups. However the more interesting problem is: are there (infinite) $\textit{finitely generated}$ groups with all elements of finite order. ?

The answer to this was open for a long time, but it is indeed yes. In fact this was known as Burnside's problem

The first examples were given by Golod & Shafarevich.

There is alot a lot of info on the wikipedia page

http://en.wikipedia.org/wiki/Burnside%27s_problem

show/hide this revision's text 1

Yes, as per Ryan's comment you can just take an infinite direct sum of finite groups. However the more interesting problem is are there $\textit{finitely generated}$ groups with all elements of finite order.

The answer to this was open for a long time, but it is indeed yes. In fact this was known as Burnside's problem

The first examples were given by Golod & Shafarevich.

There is alot of info on the wikipedia page

http://en.wikipedia.org/wiki/Burnside%27s_problem