The outlawed political organization said in statements on its Ikhwanweb Internet portal that at least five members of the Muslim Brotherhood were arrested for putting up campaign posters for members of the group.
"The arrests are a clear indication of the regime's true intentions and sheds light on what is expected to come during the elections," the Ikhwanweb report read.
Mohammed Badie, a top official in the Muslim Brotherhood, said his organization would put as many as 150 candidates on the ballot for the 508 seats at stake in next month's parliamentary election.
The Muslim Brotherhood is banned from running openly. Its candidates won 20 percent of the seats in parliament in 2005 by running as independents, however.
Muslim Brotherhood supporters said the image of the ruling National Democratic Party will be tarnished by the latest crackdown.
The group is allied with Egyptian diplomat and opposition leader Mohamed ElBaradei, who called for a boycott of the November elections.