The amusing banner outside St John's and King's Park church in Dalkeith near Edinburgh was put up during building work.
"Church is not closed! We are undergoing a faith lift," it reads.
The minister who came up with the pun says he's delighted people have seen the funny side.
Revd Keith Mack said: "I'm surprised it's generated so much interest. The work just started a couple of weeks ago, and when I saw the large 'Danger! Keep out!' sign on our front door I knew we were sending out the wrong message.
"We put the banner up last weekend. I can't claim credit for the pun, as I first heard it somewhere else, but I am pleased people enjoy seeing the church showing a sense of humour.
"It's wonderful to think that in temporarily closing our church we have managed to raise its profile."
The Church of Scotland said the Facebook post with the image had reached tens of thousands of people.
The congregation at St John's and King's Park are meeting at King's Park school in Dalkeith at 11am each Sunday until the refurbishment is completed this summer.