A roof ridge ventilator made of a flexible unitary plastic panel adjustable to the configuration of various roof pitches having: Z-shaped and Y-shaped supports spaced from and alternating each other supporting the panel over the roof; ventilation means of rows of vent slots and slats running longitudinally on the two sides of the panel in which the slots and slats have trapezoidal configurations; vertical exterior baffles integral with the vent slats and running parallel thereto; and baffle extenders integral with the exterior baffles and at an angle of from about 130.degree. to about 160.degree. from the plane of the vertical exterior baffles.
