A conservative legal group, Judicial Watch, is suing for access to Senator Clinton’s calendars, phone logs, and office diary during her time as first lady.

The records are housed at the Clinton Presidential Library in Little Rock, Ark., but the suit was filed against the National Archives and Records Administration, which has legal custody of documents from the Clinton White House.

“We think there’ll be good information in these documents,” the president of Judicial Watch, Thomas Fitton, said in an interview. “The schedules showing who’s coming and going to her office are of historical and current interest.”

“Given Mrs. Clinton’s current status as a presidential candidate, if not the frontrunner for the Democratic Party’s nomination, the public interest in her tenure as First Lady is undeniable,” the group wrote in a request for an order to force disclosure of the records.

The director of the Clinton Library, David Alsobrook, and a spokeswoman for the National Archives, Susan Cooper, did not return calls seeking comment for this article.

Mr. Fitton said his group filed a Freedom of Information Act request for the calendars in April 2006. “We’ve been more than patient,” he said. “There’s got to be a way to break this logjam. Hopefully, this lawsuit is it.”

Under the Presidential Records Act, the library began accepting public requests for documents in January 2006, five years after President Clinton left office. The library’s Web site describes four requests completed to date. One produced about 4,300 pages of records from a White House Conference on Culture and Diplomacy held in 2000. The other three requests were for official photographs of Mr. Clinton, including his preparation for a debate with Robert Dole in 1996 and a meeting with the grand rabbi of New Square in 2000. The latter session led to Mr. Clinton commuting the sentences of four chasidic men imprisoned for stealing millions in housing and education subsidies.

More than 100,000 pages of records relating to health care policy, welfare reform, race relations, and other domestic issues were made available before the library began accepting requests from the public.

Mr. Fitton said those files have already yielded some interesting documents, including some suggesting that Mrs. Clinton was intimately involved in the administration’s policies on abortion. In the margin of a 1993 memo on the subject, Mr. Clinton jotted, “What does Hillary think?”

However, locating materials about Mrs. Clinton in voluminous subject-by-subject White House files is difficult. “We stumbled across it by happenstance,” Mr. Fitton said.

The request for Mrs. Clinton’s calendars is similar to requests filed by the Washington Post and a liberal watchdog group, Citizens for Responsibility and Ethics in Washington, for logs of visitors to Vice President Cheney’s official residence. Mr. Cheney’s office has vigorously resisted those requests.

Under federal law, Mr. Clinton could block disclosure of the former first lady’s records until 2013 if they disclose confidential communications between his advisers.

Judicial Watch’s lawsuit, filed Tuesday in federal court in the capital, was assigned to Judge James Robertson. He was appointed by Mr. Clinton.