A windscreen wiper device (1) of the flat blade type, particularly for automobiles, comprising an elastic, elongated carrier element, as well as an elongated wiper blade (2) of a flexible material, which can be placed in abutment with a windscreen to be wiped, which wiper blade (2) includes opposing longitudinal grooves (3) on its longitudinal sides, in which grooves (3) spaced-apart longitudinal strips (4) of the carrier element are disposed, which windscreen wiper device (1) comprises a connecting device (5) for an oscillating arm, wherein said oscillating arm can be pivotally connected to said connecting device (5) about a pivot axis near one end thereof, with the special feature that said connecting device (5) is connected to at least one longitudinal strip (4) by at least one pin (13) cooperating with a hole (15) provided in said longitudinal strip (4), wherein said pin (13) is movable from a first position, wherein said pin (13) in a pre-mounted position is fixed to said connecting device (5), into a second position, wherein said pin (13) in a mounted position as a single constructional element is interconnecting said connecting device (5) and said longitudinal strip (4).