The peso closed at 13.91 per dollar, up 0.65 percent over Thursday's close and strenthening 0.86 percent this week.
Center-right President Mauricio Macri allowed the peso to float after taking office in December, spurring a slide in the curreny to 15.76 per dollar in Febuary.
But the soy harvest, a deal with holdout investors who had refused debt restructurings after a record 2002 default and declining interest rates have helped the peso firm to current levels.