Some 60 percent of those surveyed said they would vote for Merkel, according to results published by German news weekly Stern and broadcaster RTL on Wednesday.
Only 12 percent of those polled said they would vote for centre-left Social Democrat (SPD) party leader Kurt Beck. The SPD, partnered with Merkel's conservative Christian Democratic Union (CDU) in Germany's grand coalition government, has been suffering all-time low approval ratings, but the party managed gained one percent to reach 24 percent.
Meanwhile the poll, conducted by German association for social research Forsa, showed that hard-line socialist Left Party, which has been slowly gaining popularity, was down one percentage point to 13 percent of voter support.
Forsa said results of the poll came from 2,503 representative German citizens who were interviewed between March 31 and April 4.