During an appearance on The Late Show with David Letterman, the comedian said that he does not believe NBC execs are looking to wrap up the sitcom.
"I don't think they do that with such a show in America," he said. "They've got loads of people to play the boss. There will be more people who play that boss than dogs who played Lassie."
Gervais, who will appear in The Office's season finale alongside a host of guest stars, laughed off suggestions that he'd join the series permanently by jesting that his executive producer credit guarantees him "half [the actors'] wages anyway".
Despite his insistence that The Office isn't in danger of cancellation, Gervais remarked that he does see a natural end for the faux-documentary on the horizon.
"I don't know how long a documentary would hang around an office," the star teased. "It's been a long time."
It was recently reported that Catherine Tate and James Spader will also appear on the upcoming season finale to portray possible replacements for Michael Scott.
> 'The Office' guest stars get character names
The Office returns with new episode 'Training Day' at 9pm ET/8pm CT tonight on NBC.
Watch a preview of Will Ferrell's Office debut below: