Terry, 36, has played just five Premier League games all season and looks set to leave in the summer.
Lampard – who has been at Chelsea’s training ground coaching the club’s kids – is close mates with Terry and says he just wants to play.
Asked if the pair have spoken, Lampard said: “Yeah. I say he’s happy but he’s obviously not happy because you know what John’s like, he wants to play.
“I spoke to him a couple of days ago at the training ground and I actually said what a credit he is for the way he’s been.
Frank Lampard says John Terry is not happy at Chelsea
“At his age and with his stature of the club, he could either sit back and look to the future and wonder what he’s going to do.”
“He could kick up a fuss and do anything.
“But he’s trained hard and I know that from behind the scenes.
Is this the clue that John Terry is heading for the Chelsea exit? Fri, February 17, 2017
Chelsea captain John Terry has posted an Instagram story of himself learning to speak Portuguese – is this the clue he could be heading for the Stamford Bridge exit?
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Has Chelsea captain John Terry hinted at an imminent Stamford Bridge exit?
He’s been a real credit to himself this year
Frank Lampard on John Terry
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“He’s travelled up north to games when he’s injured, or not in the squad, and I don’t think you can forget the influence John is having.
“His experience, his know-how and drive, he will be doing that behind the scenes.
“He’s been a real credit to himself this year.”