By Patryk Wasilewski 
 

WARSAW--The National Bank of Poland on Wednesday dismissed rumors the bank's governor may resign before his term ends in June 2016.

After opposition challenger Andrzej Duda won the presidential election Sunday, Polish media began speculating that Marek Belka would resign from his role as central bank governor in order to give the current president a last-minute shot at naming his successor. Mr. Duda is set to replace the incumbent Bronislaw Komorowski in August.

Polish daily Parkiet quoted lawmaker Jacek Sasin as saying he had received information on attempts to accelerate the selection of the new central bank governor.

Marcin Kaszuba, head of the bank's communications, said Mr. Belka "plans to continue his mission in line with his mandate," and that "the value of the zloty and Poland's financial-sector stability always were, and will, remain his main prerogatives."

Mr. Belka was named central bank governor in June 2010 by Mr. Komorowski after his predecessor's death in an airplane crash in Smolensk.

Market watchers are convinced conservative Mr. Duda won't reappoint the governor to a further term. Mr. Belka is Poland's former prime minister, finance minister and former member of the post-communist Democratic Left Alliance.

Poland's president picks the central bank governor, but the appointment has to be confirmed by parliament. The EU's largest emerging economy faces a general election in the autumn.

Write to Patryk Wasilewski at patryk.wasilewski@wsj.com