Four months on since his presidential election victory, the poll by the Ifop organisation for the Journal du Dimanche registered a drop of 11 percentage points on the August reading.
And it is one of the worst popularity levels for a leader in more than 50 years since the start of the fifth republic.
The slide in the popularity of François Hollande comes ahead of a potentially troublesome week for the president as the budget for 2013 will be announced on Friday.
So between now and then you can expect to see news stories on the possible measures set to be announced as the government looks to tackle a €30 billion hole with spending cuts and tax rises.
The Ministère de l'Economie et des Finances will be the online destination to keep an eye on for the official line.