The film, starring Toby Maguire as the web-spinning super-hero, is topping the box office in the US.
But it isn't due out in nationwide in the UK until 14 June.
The illegal DVDs of the film are being sold on market stalls for a mere £7 and are really professionally packaged, says the Sun newspaper.
And apparently the quality of the sound and pictures is amazing.
Illegal pirating of films on video costs the movie industry millions every year.
But it's now getting easier for people to make DVD copies of films.
Cheaper and more widely available technologies make DVD recording much more straightforward nowadays.
All the big flicks like Fellowship of the Ring and Attack of the Clones have been sold as cut-price pirates.
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