WASHINGTON (AP) — A Republican member of the National Labor Relations Board improperly revealed information about the agency’s private deliberations to outside parties who had cases pending before the board, an internal government watchdog said Friday.

The board’s inspector general said the member, Terence F. Flynn, violated ethics rules by sharing confidential details on the status of pending cases and the likely votes of other members before decisions were released. A report from Inspector General David P. Berry also faulted Mr. Flynn for a “lack of candor” during the investigation.

President Obama appointed Mr. Flynn and two others to the board in January. The report said Mr. Flynn committed the violations when he was still a staff lawyer at the agency, before he was elevated to one of its five members.

The N.L.R.B. oversees union elections and enforces rules on unfair labor practices. Its five board members — three Democrats and two Republicans — function much like judges on an appeals court, hearing cases and issuing legal decisions.