A latching system for a door or window that includes a first snap stop member adapted to be arranged at a side edge of a leaf of the door or window, the first stop member includes a pawl rotatable about an axis perpendicular to the plane defined by the leaf; a second snap stop member adapted to be arranged at an upper edge of the leaf, the second stop member comprising a pivot translatable in a vertical direction; a handle rotatable so as to control the releasing movement of the first and second stop members, the handle being rotatable about a horizontal axis parallel to the plane defined by the leaf; and a first and a second transmission mechanism for converting a rotation of the handle into a rotation of the pawl and a translation of the pivot, respectively.