Meanwhile, Christian Democratic leader Göran Hägglund has slipped down to sixth place.
Between March 5th and 10th, the Synovate polling firm asked 1,016 people how much confidence they have in the leaders of political parties represented in the Riksdag.
The poll was carried out at the request of the newspaper Dagens Nyheter.
Compared with an earlier survey carried out in September of last year, confidence in Reinfeldt has dropped from 44 to 40 percent. During the same period, confidence in Sahlin has increased from 37 to 38 percent.
Center Party leader Maud Olofsson landed in third place with 34 percent, unchanged from last year’s poll. Next in line was Liberal Party leader Jan Björklund, with 28 percent, followed closely by Maria Wetterstrand of the Green Party with 27 percent, and then Hägglund, who registered 23 percent.
Peter Eriksson, also of the Green Party, garnered 19 percent, while Left Party leader Lars Ohly rounded out the list with 18 percent.