The accused was identified as Manoj Sarbare, attached to sub-divisional police office, Ahmednagar (Rural).
He had sought the bribe from the complainant to thwart a possible externment order, ACB said.
Parner police station had sent a proposal for externing the complainant to sub-divisional-police officer at Ahmednagar under Mumbai Police Act.
Sarbare allegedly demanded bribe for preparing a report in favour of the complainant. He was arrested in a trap by ACB at his office.