Bent could make his comeback from a hamstring injury in the FA Cup third-round tie with his former club Ipswich at Villa Park after returning to training on Friday.
The England international had lost his role as senior striker to Christian Benteke before suffering the injury setback in the Capital One Cup clash with Norwich three weeks ago.
But Lambert is adamant he does not need to let anyone go this month, while he also refused to dismiss a possible move for Manchester City defender Joleon Lescott.
"I don't need to get rid of anybody at the club at all," Lambert said. "I don't need to do it. It's not something I've thought about.
"If a player hasn't played a few games, people automatically think that is what is going to happen.
"But I've never come out and said anything. I thought Darren looked okay at Norwich before his hamstring went."
Bent has been linked with fellow strugglers QPR and Fulham plus mid-table West Ham.
But when suggested to Lambert that it would be daft to offload Bent to a relegation rival, he said: "Of course it would."