Neil Doncaster has dismissed Nicola Sturgeon's suggestion that Saturday's Celtic vs Rangers game should be shown free-to-air.
The move, first proposed by the Scottish Green Party, was endorsed by the First Minister at Holyrood on Thursday.
However, the head of the SPFL insists the broadcaster shouldn't be expected to take that financial hit having already put plenty of money into the game.
Doncaster told BBC Radio Scotland: "We saw the comments that the game should be given away for free and we agree with Sky that it wouldn't be a reasonable thing to ask when they've invested so much in the product and in Scottish football.
"Ultimately Sky have invested well over £125million for the next four seasons, as well as this season in Scottish football, and they've bought the rights on an exclusive basis with a view to people subscribing for their services.
"I think it's unreasonable that Sky give those crown jewels away."
Sturgeon had called for the match to be made available on free TV to try and prevent people gathering in houses to watch it.
The First Minister said: "I really do strongly agree with Joan McAlpine and would encourage Sky Sports this weekend to make the Rangers vs Celtic match free to view for supporters.
"As a small but important contribution that they could make to help keep people safe right now.
"Enabling people to watch the match in the comfort and safety of their own home and reduce the temptation people who don't have access to pay-to-view services might have to go and watch the match somewhere else.
"So if anyone from Sky Sports is listening, I would encourage you to think about making the match free to view this weekend."
