Wenger also revealed that he never doubted that the young midfielder would recover from his broken leg in 2010.
"I brought him in because of his quality. [What] people forget about Ramsey is that this is his first full season really," Wenger told Goal.com.
"He is a bit young to be a captain, because it is a massive responsibility for a player that age with the little experience he has. However, he can take pressure so he will grow very quickly in this role and he will be a great captain for Wales."
Arsenal travel to Swansea in the Premier League on Sunday afternoon.