Boiserie for wooden coating of an interior wall of a room, comprising • a compartment which is delimited by one or more vertical dividing panels, two horizontal flat panels that are spaced by the vertical dividing panels 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, a vertical wall-mounted panel which supports the horizontal flat panel; characterized in that the one or more vertical dividing panels comprise: two plates of equal right-quadrilateral shape, two spacer elements (20, 40) 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 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, two horizontal flat panels that are spaced by the vertical dividing panels a vertical wall-mounted panel which supports the horizontal flat panels, or one or more vertical dividing panels, two horizontal flat panels that are spaced by the vertical dividing panels 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, a vertical wall-mounted panel which supports the horizontal flat panel; a horizontal flat panel one or more vertical dividing panels, a vertical wall-mounted panel which supports the horizontal flat panel; the one or more vertical dividing panels comprise: two plates of equal right-quadrilateral shape, two spacer elements (20, 40) 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 contained between the two plates and a mouth facing the outside of the parallelepiped; two plates of equal right-quadrilateral shape, two spacer elements (20, 40) 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 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.