Neverless, United have been told the Belgian International will not face any action.
"Having reviewed all available footage, the FA has decided that there is no case to answer," said an FA source.
In his press conference on Friday, United manager David Moyes revealed Fellaini had protested his innocence.
"Marouane is adamant that at no time did he do that," said Moyes.
Fellaini has had a troubled time since signing from Everton in a £27.5m transfer last Summer.
Fellaini is expected to be involved in Tuesday's Champions League Champions League quarter-final first leg against current holders and German Champions Bayern Munich at Old Trafford.