Jacob Butterfield netted as Barnsley clinched their first home point of the season on another frustrating afternoon for big-spending Leicester City.
The Foxes twice went close through new signing Jermaine Beckford early on but the Tykes responded and led through Butterfield's diving header.
Half-time substitute Andy King levelled 30 seconds after the break, shooting home following fine work by Beckford.
Both sides had chances after that but neither could find a winner.
Although City have now won just two of their opening six games they could have been contemplating a shock defeat with keeper Kasper Schmeichel having to pull off superb saves in the closing stages to deny Barnsley substitute Danny Haynes and Jim O'Brien.
But it had started promisingly for the visitors, with the lively Beckford curling a 20-yard shot wide and then testing Barnsley keeper Luke Steele with an angled shot.
Gelson Fernandes also forced Steele into action, this time from 25 yards.
Barnsley hit back in style with midfield trio David Perkins, Danny Drinkwater and O'Brien all going close and they took the lead when Andy Gray headed Jim McNulty's cross against the woodwork and Butterfield reacted quickest to head the rebound into the bottom corner.
Leicester equalised when Beckford did well to pull the ball back and King swept the ball into the bottom corner from six yards.
Schmeichel then made another fine stop from a fierce Matty Done strike while King pulled a left-footed shot wide.
An entertaining game continued to see chances created and the hosts had the better of the late ones. The excellent Schmeichel kept out Butterfield's shot, who then crossed for defender Stephen Foster to head just wide.
And the big keeper was also equal to late strikes from Haynes and O'Brien but both sides had to settle for a point.