The nation's secret intelligence court has identified more than 75 cases in which it says it was misled by the Federal Bureau of Investigation in documents in which the bureau attempted to justify its need for wiretaps and other electronic surveillance, according to the first of the court's rulings to be released publicly.

The opinion by the Foreign Intelligence Surveillance Court, which was issued in May but made public today by Congress, is stinging in its criticism of the F.B.I. and the Justice Department, which the court suggested had tried to defy the will of Congress by allowing intelligence material to be shared freely with criminal investigators.

In its opinion, the court rejected a secret request made by the Justice Department this year to allow broader cooperation and evidence-sharing between counterintelligence investigators and criminal prosecutors. The court found that the request was ''not reasonably designed'' to safeguard the privacy of Americans. The court generally operates in secret and is responsible for approving warrants to eavesdrop on people suspected of espionage or terrorism.

The opinion may be important in documenting why the F.B.I. was hesitant last summer to seek court authority to search the computer and other belongings of Zacarias Moussaoui, the only person charged in the Sept. 11 attacks.