OAKLAND, Calif. (AP) _ The founder of the Just Say No anti-drug movement championed by Nancy Reagan has quit the organization in a dispute with its new leaders.

Joan Brann, who established the first Just Say No club and helped give a theme to the first lady's anti-drug crusade, resigned as national vice president and shut down the local office here Wednesday.

The dispute started in February, when W.W. Abbott, senior vice president of Procter & Gamble Co., became chairman of the national Just Say No Foundation.

Abbott declared the organization was about $600,000 in debt and needed more professional management than it was getting from Brann or from Tom Adams, foundation president, who has since resigned.

The board also decided it could no longer afford to underwrite the local Just Say No office in Oakland.

''I can't understand why they would close us down practically without warning,'' said Brann.

Ivy Cohen, a former P&G employee who runs the foundation's national headquarters in Walnut Creek, said other Just Say No offices are operated by volunteers and are self-sufficient.

''The only local office the national foundation was paying for was Oakland's,'' she said. ''And that made up a big chunk of our deficit.