Dana Stubblefield -- I Didn't Rape That Woman ... Sex Was Consensual

Ex-NFL star Dana Stubblefield says he's NO RAPIST -- claiming the allegations he sexually assaulted a mentally disabled woman are "false and fraudulent."

As we previously reported, the former 49ers superstar was charged with 5 felonies -- after prosecutors say he raped a woman he found on a babysitting website and had invited to his home for a job interview.

But Stubblefield is adamant the sex was consensual -- and he claims he can prove it ... with a lie detector test.

In fact, Stubblefield's lawyer, Ken Rosenfeld, says he's already provided the District Attorney's Office "with professional lie detector results that clearly show the encounter was consensual."

Rosenfeld says the woman had also asked Dana for a job and money after the encounter -- which he claims is further proof there was no rape.

"Dana Stubblefield is being unfairly targeted due to his celebrity and wealth by someone with full motivation to lie," Rosenfeld said.

Stubblefield's lawyer also says his client wasn't even notified of the allegations until nearly a year after the incident.

"The clear motivation here is money."