A Long Island Rail Road rider left $9,000 in cash on a train — but miraculously got the money back when it was found by an honest conductor who turned it in to cops.

Jerry Savino was working Thursday’s 6:20 p.m. Atlantic Terminal-bound train out of Hempstead when a passenger informed his crew of an unattended file-folder suitcase on the overhead rack.

Savino looked inside and saw a wallet, tax documents, checkbooks — and the cash.

“I saw the wallet, a checkbook, important documents, along with an envelope. The envelope had a dollar sign on it,” Savino said.

“When I read the label that said $9,000, I knew the owner would want me to take good care of it.”

He brought the package and its contents to MTA Police, who identified its owner and returned the items before 10 p.m.

Savino was feted by transit brass and labor leaders at a rare joint press conference on Tuesday. The two parties are currently in the midst of what will likely be years of contract negotiations.

“This is what we do every day, this is something we don’t hear every day,” said Anthony Simon, general chairman of the Sheet Metal, Air, Rail and Transportation Workers, the LIRR’s largest union.

“Our crews are professional. Our crews act like this every single day.”