WNBA legend Chamique Holdsclaw insists she's no violent gun-slinging psychotic ex-girlfriend ... pleading not guilty to aggravated assault after allegedly firing a gun inside her ex-GF's car.
Holdsclaw entered the plea in Atlanta this morning -- also pleading not guilty to criminal damage in the first degree, criminal damage in the second degree, and possession of a firearm during the commission of a felony.
Holdsclaw -- who's currently free on bond -- was charged with the laundry list of crimes last month.
We broke the story ... Holdsclaw -- considered one of the greatest players in WNBA history -- was arrested in Atlanta last year for a violent encounter with ex-girlfriend Jennifer Lacy.
According to the police report, 35-year-old Holdsclaw attacked Lacy's car with a baseball bat and then fired a gun into the vehicle's backseat while Lacy sat in the driver's seat.