A New Jersey police chief offered one of his officers a promotion if the underling let him sleep with his wife or underage daughter, according to a report.

The Vineland police officer lodged a formal complaint against Chief Rudy Beu, who confirmed he is being investigated but claims it is a case of “retaliation,” according to NJ.com.

The accuser, who has not been identified, claims he was with his wife in a bar in 2017 when Beu first said he would promote the officer if he let him go home with his wife — asking what assets she had as he pointed up and down her body.

“She felt very uncomfortable, and that is when she walked away,” the officer told the site.

Beu made similar comments a few days later — and also referred to sex with the officer’s daughter, who was under 13, according to the report.

“As I go out the door, he says ‘How about your daughter?’ and he starts laughing,” the officer claimed, saying his boss followed him outside and yelled at his children in his parked truck that their dad was getting a promotion.

The officer went to his union, Vineland PBA Local 266, and filed a formal complaint with the city solicitor.

“[The comments] were absolutely unprofessional and if it happened the way officer said it happened, it is illegal,” union president Craig Scarpa told the site.

“I have no reason to believe that it did not happen that way because I have seen and witnessed Mr. Beu be untruthful too many times.”

Beu did not address the specific accusations, but told NJ.com that “there are two sides to every story.”

“This is a retaliatory action taken against myself and certain command staff members for reasons I cannot discuss at this time,” Beu told the site.

Beu also insisted he had forwarded the complaint to prosecutors and “demanded that we all be investigated, myself included.”

Cumberland County Prosecutor Jennifer Webb-McRae declined to comment. City Solicitor Richard Tonetta said he could not comment on specific personnel matters because they are confidential, but said they would be required to investigate any such complaints.