Prime Minister Fredrik Reinfeldt and his wife, County Commissioner Filippa Reinfeldt, separates.
The separation was announced in a brief email message from the Prime Minister's press department. When his press officer, Roberta Alenius, was contacted to verify the email she would not comment on the matter further.
"All you need to know is in the press release," she told news agency TT.
The couple married in 1992 and have three children, aged 18, 16, and 11. It is not yet known whether the separation is thought to lead to a divorce. Swedish spouses who have dependent children under 16 are forced to six months of time for consideration before a divorce can go through, even if both spouses agree to a divorce.
The separation is assumed not to result in any political implications.
Sweden's former Prime Minister, Göran Persson, divorced from his wife in 2002, during his tenure.