Fine Gael has lost support, according to a new opinion poll, while Sinn Féin remains the country's most popular party.
The Ireland Thinks poll, for the Sunday Independent, suggests Sinn Féin's support has dropped by one point, and stands at 31%.
The survey also suggests that Fine Gael has dropped support by three points and now stands at 22%.
However, Fianna Fáil has gained support and stands at 18% - up two points.
Green Party support is unchanged at 4%.
Both the Labour Party and the Social Democrats have gained a point to stand at 4%.
Aontu also stands at 4% - an increase of one point.
People Before Profit / Solidarity is at 3% - down one.
Independents and others are unchanged at 10%.
Ireland Thinks interviewed more than 1,212 voters for their poll between 2-3 February.
The margin of error is plus or minus 2.9%.
State of the Parties (last month)
Sinn Féin 31 (32)
Fine Gael 22 (25)
Fianna Fáil 18 (16)
Green Party 4 (4)
Solidarity-PBP 3 (4)
Aontú 4 (3)
Social Democrats 4 (3)
Labour 4 (3)
Independents/Other 10 (10)