Support for Fianna Fáil has also fallen.
A TNS mrbi poll in tomorrow's Irish Times shows that 15% of voters are satisfied with the way the Taoiseach is doing his job, which is a fall of 6% since May.
When undecideds are excluded, the poll shows support for Fianna Fáil is at 17%, down 3% since May.
Fine Gael is also down by 2% to 34%, which is exactly twice as much support as Fianna Fáil.
Labour is up 1% to 24%, putting it firmly in second place, while Sinn Féin has gained 2% to 10%.
The Green Party remains unchanged at 3%.
Independents and others are up 2% to 12%.
Satisfaction with the Government's performance is down 1% to 11% since May, while 85% are dissatisfied and 4% are undecided.
The Taoiseach's satisfaction rate has fallen 5% to just 15%.
29% of people polled are satisfied with Fine Gael's Enda Kenny, down 2% from the last poll, Labour's Eamon Gilmore is down two to 47% - the highest satisfaction rating of all the leaders.
Satisfaction with Green Party leader John Gormley is down 8% to 19%, while Sinn Féin's Gerry Adams has dropped 5% to 28%.
