The senior Pentagon official in charge of military detainees suspected of terrorism said in an interview this week that he was dismayed that lawyers at many of the nation’s top firms were representing prisoners at Guantánamo Bay, Cuba, and that the firms’ corporate clients should consider ending their business ties.

The comments by Charles D. Stimson, the deputy assistant secretary of defense for detainee affairs, produced an instant torrent of anger from lawyers, legal ethics specialists and bar association officials, who said Friday that his comments were repellent and displayed an ignorance of the duties of lawyers to represent people in legal trouble.

“This is prejudicial to the administration of justice,” said Stephen Gillers, a law professor at New York University and an authority on legal ethics. “It’s possible that lawyers willing to undertake what has been long viewed as an admirable chore will decline to do so for fear of antagonizing important clients.

“We have a senior government official suggesting that representing these people somehow compromises American interests, and he even names the firms, giving a target to corporate America.”

Mr. Stimson made his remarks in an interview on Thursday with Federal News Radio, a local Washington-based station that is aimed at an audience of government employees.

The same point appeared Friday on the editorial page of The Wall Street Journal, where Robert L. Pollock, a member of the newspaper’s editorial board, cited the list of law firms and quoted an unnamed “senior U.S. official” as saying, “Corporate C.E.O.’s seeing this should ask firms to choose between lucrative retainers and representing terrorists.”

In his radio interview, Mr. Stimson said: “I think the news story that you’re really going to start seeing in the next couple of weeks is this: As a result of a FOIA request through a major news organization, somebody asked, ‘Who are the lawyers around this country representing detainees down there?’ and you know what, it’s shocking.” The F.O.I.A. reference was to a Freedom of Information Act request submitted by Monica Crowley, a conservative syndicated talk show host, asking for the names of all the lawyers and law firms representing Guantánamo detainees in federal court cases.