The Nottingham Forest manager is determined not to let the midfielder leave the City Ground.
Forest owner Fawaz Al Hasawi recently sold talented duo Karl Darlow and Jamaal Lascelles to Newcastle for a cut-price of £7 million. Pearce spoke out against the sale, saying that Al Hasawi made the move against his will.
Burnley are interested in signing Lansbury, and have reportedly tabled a bid in the region of £4 million.
But Pearce believes that both he and the owner are united in their desire to hold on to the former Arsenal man in this transfer window.
"There's been interest in Henri, but nothing anywhere near our valuation," the Forest boss said. "We all turned it down – we are in unity on that one."
"I certainly hope we will not be losing any other players. The only ones I would want to move out is the ones I give the proviso to move out, who are not helpful to me.
"If I get asked the question, I will give an honest answer over who should and shouldn't go. Hopefully, more often than not, the owners will take my guidance on that."
Pearce has been full of praise for Lansbury in recent weeks as the interest from Burnley and other Premier League clubs mounts. He reiterated his belief that the midfielder is one of the Championship's top players, and his desire to keep him at the City Ground.
"I wouldn't want Henri to go. I know there's been interest, but I would not want him to go, that is where I stand on him," Pearce said.
"I've had a long connection with him at international level and I want that to continue at club level.
"He is one of the better players in the Championship, if not one of the best in the top echelons of the division overall. Can he play in the Premier League? Yes he can in my opinion."