Gov. Andrew M. Cuomo demanded Wednesday that New York City Mayor Bill de Blasio apologize for suggesting the governor’s office was behind the leak of a report concluding that the mayor broke campaign finance laws.

Speaking after an unrelated event on the rehabilitation of LaGuardia Airport, Cuomo said “the mayor was wrong” and “I think he should apologize.”

“He’s a big boy. He can make his own decision,” Cuomo said of his fellow Democrat.

The report in question, by Board of Elections Chief Enforcement Officer Risa Sugarman, was leaked in April to the media. Sugarman found “willful and flagrant” violations by de Blasio and his inner circle to avoid donation caps in a failed 2014 bid to flip the Republican-controlled state Senate into Democratic hands.

The report was referred for prosecution to the Manhattan district attorney’s office, which is conducting a criminal probe. A separate state investigation released earlier this week concluded that a spokesman for the state Board of Elections leaked the document.

Asked whether de Blasio would heed the governor’s call for an apology, de Blasio spokeswoman Karen Hinton said: “The State BOE leaked a confidential memo and has been called out for failing to have proper policies in place to safeguard against these leaks. The BOE owes the people of New York an apology for such a flagrantly political act.”

De Blasio had repeatedly suggested that the leak was a political act. On May 13, for example, he told WNYC’s Brian Lehrer, “You can follow the personnel trail, and a lot of it does go to the executive branch.”

Cuomo made his remarks Wednesday at one of the newly finished buildings at One World Trade Center.

“The mayor accused career public servants, basically, of unprofessional conduct — of leaking the report,” Cuomo said Wednesday. “But he makes his own decision.”