The Blues goalkeeper insists the England international, whose contract expires at the end of the season, is still vital to the team after become the second-highest goalscorer
The second-half penalty in the 4-0 win on Saturday afternoon took Lampard’s tally to 194 - moving him above Kerry Dixon and just eight away from all-time top goalscorer Bobby Tambling.
Lampard's future appears to lie away from Stamford Bridge after his agent confirmed last week that the 34-year-old would not be offered an extension to his expiring contract - but Cech still remains hopeful that the England international can remain at the club.
"There are still six months to go to the end of the season," Cech told reporters. "We’ll see at the end of the season whether he stays or not.
"I don’t know, as I’m not a director, but if he keeps playing like that then obviously he will keep asking about the extension."
Lampard's goal at the Britannia Stadium took his tally to seven in just 13 Premier League outings this season, behind only Juan Mata and Fernando Torres in the Blues' scoring charts,
The youthful talents of Ramires, Oscar, Eden Hazard and Mata have been preferred this season, but Cech insists Lampard's experience remains a vital component to the squad.
"The team changed, his age has changed, but he’s still important for the team," Cech continued.
"You can see that he might not start every game, he might not play every game. But when he plays, he plays well with his quality and his experience. This is something that is great to see.
"I’ve known him a long time. He’s been a fantastic player for the club. He continues to do so, so it’s fantastic for him.
"He’s stayed already for years in the same club, bad times, good times. Mostly good times. That shows the loyalty of the player."