Programmes downloaded will be available up to 30 days on mobile devices and do not need a WI-FI or 3G signal.
Once a user presses play to view a programme, they are able to watch it for seven more days.
The feature also allows users to watch programmes on their mobile when abroad.
"With mobile downloads for BBC iPlayer, you can now load up your mobile phone or tablet with hours and hours of BBC television programmes, then watch them on the road, on the tube, on a plane, without worrying about having an internet connection or running up a mobile data bill," said Daniel Danker, BBC general manager for programmes and On demand.
"Viewers have up to 30 days to begin watching a downloaded programme, so you can even fill up your device and take the BBC with you on holiday."
The feature is currently available on iPad, iPhone and iPod touch devices and will be rolled out to Android devices soon.
The new mobile feature aims to support BBC iPlayer’s goal to move beyond its PC offering and make its content easily available for mobiles and tablets.
In the month of July BBC iPlayer received 30 million requests for TV programmes to be made available for mobile and tablet usage.
The BBC iPlayer app is available on iTunes App Store. Users who already have the app can update their app on iTunes App store.
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