The pocket-type opening panel with several panels (11,12) hinged to each other according to horizontal articulation axes comprise an upper panel (11) hinged according to an upper axis (A1) to a fixed frame (2), and a lower panel (12) pivoting according to a lower horizontal axis (A3) located at the lower edge (121) of same and guided in a vertical direction. Control means for controlling opening and closing are arranged to move the lower edge of the lower panel in the vertical direction, at least one of the panels comprising, on each side, a control arm (112, 122) rigidly linked to the panel and extending from said panel in a direction transverse to the general plane of the opening panel, and said control means, comprising, for example, a motorised carriage (40) that can be moved along a rack (31), are arranged to act on said control arms, at a predefined distance from said general plane, so as to exert a pivoting torque on the panel or panels carrying said control arms, in addition to moving the lower edge o
