The Rev. Al Sharpton pledged his support for the female board member of his National Action Network who claims his oversexed lawyer friend Sanford Rubensteinraped her last week — and Sharpton backed her attorney’s call for justice, a source said.

Sharpton was at a clergy dinner Thursday night with the woman’s lawyer, Keith White, when the activist rev. pledged his “full faith and support for the victim and the push for the Manhattan district attorney to properly and expeditiously seek justice in this case.”

The pledge came after the family of Eric Garner fired Rubenstein’s law firm.

A day after the embattled attorney took himself off the $75 million fatal-police-chokehold case, the dead man’s widow hired attorney Jonathan Moore — the same lawyer who successfully won a $41 million settlement in the “Central Park Five” lawsuit, The Post has learned.

“I will say at this point that this looks like an egregious case of an officer overreacting to a situation,” Moore told The Post Thursday.

He would not comment further on the case.

Rubenstein’s firm was fired amid allegations that he drugged the NAN board member and had sex with her after Sharpton’s 60th-birthday bash last week.

Authorities were waiting for lab results from a rape kit.