The charges are related to their Champions League semi-final exit to Barcelona, when Tom Henning Ovrebo was insulted by several Chelsea players.
A statement from UEFA said: “UEFA has initiated disciplinary proceedings against Chelsea FC, Didier Drogba and Jose Bosingwa in relation to incidents following the UEFA Champions League semi-final second leg against FC Barcelona at Stamford Bridge.
“The club are charged with the improper conduct of their players and the throwing of missiles by their supporters, while Drogba and Bosingwa are accused of being in breach of the principles of sportsmanship by insulting the referee by making offensive comments.
“The club and the individuals concerned have been requested to file a statement by Friday 29 May.”
