Former Playboy Playmate Ashley Mattingly says ... her ex-boyfriend Lane Garrison has attacked her on multiple occasions ... and she has the photos to prove it.
Mattingly just appeared on "TMZ Live" ... and told us the former "Prison Break" star beat her up just a few months ago ... leaving marks all over her chest and arms.
Mattingly says Lane persuaded her not to press charges because he was almost off parole ... stemming from his 2006 vehicular manslaughter conviction ... and she felt bad for the guy.
But after Saturday's incident -- in which Garrison was captured on tape smacking Mattingly in the face -- Ashley says, "Enough is enough."
Ashley tells us she had tried to break up with Lane several times over the past several months, but claims he's like a "leech" ... who refused to let her go.
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