The Tyneside club have made a clutch of signings this summer as Vurnon Anita, Gael Bigirimana and Romain Amalfitano have arrived to help bolster the midfield, while Australian defender Curtis Good was also snapped up from Melbourne Heart.
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However, a number of the Magpies' key players have been linked with moves away from St James' Park, and Pardew - who lost striker Andy Carroll to Liverpool on the last day of the window in January 2011 - believes the length of the window hands an unfair advantage to the game's biggest hitters.
He told BBC Newcastle: "It's unsettling and unsavoury and it needs to be eliminated. It's really not fair. The transfer window should be shut before we kick a ball and that way everyone knows where they are.
"If you can't do your business in the summer, then I don't know why because there is plenty of time.
"The reality is it (the transfer window) shuts on Friday night and we have to sweat right up to 12 o'clock. That's the type of club we are now.
"The top three or four teams have a massive advantage; they can even play with you and say they are coming for one of your players but then not actually [do so]. I'm sure that goes on"