No, this is what you need: http://files.cablewholesale.com/hires/10um-021xxbk-4.jpg
This is only called a "Mini USB"... what you need is what you said, a "Mini B"
Many digital camera's DO take this Mini USB wire, but if your camera needs a "Mini B" which is a 4 pin, then this cable is not for you.
See the picture I linked to, I found the biggest one I could so that it would be easy for you to see the detail of what the tip of the wire you need looks like. You can buy one online cheap if there's none on Listia, I did and it worked fine (I have LOTS of electronics) If you have trouble finding it, let me know... I am always happy to help, even if your not bidding =)