Federal drug agents busted a veteran Rikers Island guard after he allegedly agreed to help a prisoner escape in return for $90,000 worth of cocaine.

Robert Whitfield, 48, of Rosedale, Queens, was arrested Tuesday afternoon. Cops also busted an accomplice, who allegedly picked up 6½ pounds of cocaine on Whitfield’s behalf.

Earlier this year, Whitfield promised to help free a Rikers inmate in return for cash or drugs, said Special Narcotics Prosecutor Bridget Brennan.

An undercover Drug Enforcement Administration agent then reached out to Whitfield, and worked out the details of the plan in several phone calls.

Whitfield sent an intermediary, Islime Duvivier, 48, to pick up the drugs in Washington Heights.

Duvivier was arrested as soon as he took the drugs from a federal agent. Whitfield was arrested a short time later in his car two blocks away.

Whitfield is charged with drug possession, bribe taking, conspiracy and official misconduct. Duvivier, of South Jamaica, Queens, is charged with drug possession.

Whitfield is a 21-year veteran of the Correction Department.

“The charges in this case accuse one correction officer of betraying the public’s trust in a most reprehensible way,” Brennan said.