Pulis has been criticised by some fans after guiding Stoke to just one win in their last 11 league games.
Saturday's 0-0 draw with West Bromwich Albion ended a run of three straight defeats and Cameron has said that the squad remain upbeat despite their form.
"The players are behind the manager 100%," he told The Sun.
"Losing to Newcastle with that late goal was a big dagger to us. Most teams would put their heads down and not come back from that but we showed we still have a positive attitude.
"You get these bad bounces and there's no sense in being negative."
Stoke are currently 11th in the Premier League table.