England hooker Dylan Hartley (L) and teammate Matt Banahan practise during a Rugby World Cup training session in Auckland last September. Hartley has been given an eight-week ban for biting Ireland flanker Stephen Ferris. Photo Reuters
A Six Nations disciplinary committee hearing on Tuesday found Hartley guilty of "acts contrary to good sportsmanship".
Northampton captain Hartley, 26, will miss the rest of the season although he will be available for selection for England's tour of South Africa.
It is not the first time New Zealand-born Hartley has been in trouble after serving a 26-week ban for eye-gouging in 2007.
Hartley was found to have bitten Ferris's finger in the 28th minute of England's 30-9 win, although the incident was not picked up by television cameras.