Support for PiS's main adversary and previous ruling party Civic Platform (PO) shrank to 15 percent from 16 percent in January.
Support for the pro-business Nowoczesna Party went down by two percentage points to 13 percent.
Right-wing Kukiz'15 was supported by 9 percent of the respondents, down by 2 percentage points.
Support for former junior coalition member Polish People's Party (PSL) went up to 5 percent from 3 percent in January, bringing the party to the five percent threshold required for parliamentary representation.
Libertarian KORWiN and two left-wing parties, Together and the Left, would not get any seats in parliament as their support ranged from 2 to 3 percent.
The survey was conducted on a sample of 959 adult Poles on February 5-10, 2016. (PAP)
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