Boiserie for wooden coating of an interior wall of a room, comprising • a compartment which is delimited by one or more vertical dividing panels (MC), two horizontal flat panels that are spaced by the vertical dividing panels (MC) a vertical wall-mounted panel which supports the horizontal flat panels , or • a compartment wherein the ceiling of the compartment is missing and which is delimited by a horizontal flat panel one or more vertical dividing panels (MC), a vertical wall-mounted panel which supports the horizontal flat panel ; characterized in that the one or more vertical dividing panels (MC) comprise: two plates of equal right-quadrilateral shape, two spacer elements of equal thickness, fixed between the plates so as to form overall a parallelepiped of which the plates, parallel to each other, form two opposing major sides thereof, and one of the two spacer elements is located along a perimeter edge of the two plates and is bored in its thickness by at least one hole having an axis (X) contained between the two plates and a mouth facing the outside of the parallelepiped; and in that the vertical dividing panels are horizontally separated from each other, and attached to the vertical wall-mounted panel through a screw that crosses the vertical wall-mounted panel and engages in said hole . • a compartment which is delimited by one or more vertical dividing panels (MC), two horizontal flat panels that are spaced by the vertical dividing panels (MC) a vertical wall-mounted panel which supports the horizontal flat panels , or one or more vertical dividing panels (MC), two horizontal flat panels that are spaced by the vertical dividing panels (MC) a vertical wall-mounted panel which supports the horizontal flat panels , • a compartment wherein the ceiling of the compartment is missing and which is delimited by a horizontal flat panel one or more vertical dividing panels (MC), a vertical wall-mounted panel which supports the horizontal flat panel ; a horizontal flat panel one or more vertical dividing panels (MC), a vertical wall-mounted panel which supports the horizontal flat panel ; the one or more vertical dividing panels (MC) comprise: two plates of equal right-quadrilateral shape, two spacer elements of equal thickness, fixed between the plates so as to form overall a parallelepiped of which the plates, parallel to each other, form two opposing major sides thereof, and one of the two spacer elements is located along a perimeter edge of the two plates and is bored in its thickness by at least one hole having an axis (X) contained between the two plates and a mouth facing the outside of the parallelepiped; two plates of equal right-quadrilateral shape, two spacer elements of equal thickness, fixed between the plates so as to form overall a parallelepiped of which the plates, parallel to each other, form two opposing major sides thereof, and one of the two spacer elements is located along a perimeter edge of the two plates and is bored in its thickness by at least one hole having an axis (X) contained between the two plates and a mouth facing the outside of the parallelepiped; and in that the vertical dividing panels are horizontally separated from each other, and attached to the vertical wall-mounted panel through a screw that crosses the vertical wall-mounted panel and engages in said hole . horizontally separated from each other, and attached to the vertical wall-mounted panel through a screw that crosses the vertical wall-mounted panel and engages in said hole . <EOS>