SDM Narendra Singh of Tiloi assembly segment has been replaced by Anil Kumar Singh on the instruction of Election Commission, a top district official said.
Anil Kumar Singh was earlier posted as Sub-divisional Magistrate in state capital Lucknow.
According to sources, there were complaints of bias against Narendra Singh.
Amethi is witnessing a high-voltage contest among Congress vice president Rahul Gandhi, BJP's Smriti Irani and Aam Aadmi Party candidate Kumar Vishwas.
BJP prime ministerial candidate Narendra Modi had yesterday addressed a rally in the constituency represented by Gandhi, while Rahul's sister Priyanka had extensively campaigned here.