A windscreen wiper device comprising an elastic, elongated carrier element, as well as an elongated wiper blade of the flat blade type, a mounting head for transferring a reciprocal movement to said wiper blade, as well as a connecting device for an oscillating arm with the interposition of a joint part, wherein said joint part comprises at least one resilient tongue engaging in a correspondingly shaped hole provided in said oscillating arm, wherein said oscillating arm has an U-shaped cross-section at the location of its connection to said joint part, with the special feature that said oscillating arm and said joint part are interconnected by introduction of said joint part inside the U-shaped cross-section of said oscillating arm at a location between the hole provided in said oscillating arm and said mounting head.