It’s the teacher’s pet.

The city teachers union is helping bankroll the costs of the New York NAACP’s 75th-anniversary conference beginning today.

The United Federation of Teachers is listed as one of the top three financial sponsors for the three-day Diamond Jubilee celebration at the Westin Times Square Hotel and Conference Center.

The UFT contributed $25,000, and union President Mike Mulgrew is listed as one of the participants.

Charter-school parents immediately ripped the UFT’s role in the civil-rights group’s conference. They say it provides further evidence that the NAACP has become a union lackey instead of supporting student choice.

Over the past two years, the NAACP has joined the UFT in lawsuits seeking to block the placement of charters in public- school buildings. School-choice proponents see the union’s financial support of the NAACP as payback.

“A once-proud civil-rights organization seems to be working against African-Americans in New York trying to gain better access to an education. The NAACP has become the public-relations arm of the UFT in minority communities, which is disheartening,’’ said Karl Willingam, a parent of a third-grader at the Harlem Success Academy II charter in Harlem.

The NAACP declined comment.