A piece of furniture, which comprises at least a rear wall, as well as a number of constructional parts, which form a whole in which the rear wall has to be provided, wherein the rear wall forms the rear side of the piece of furniture and consists of at least two rear wall parts, and wherein the constructional parts comprise, on the one hand, exterior panels as well as, on the other hand, one or more intermediate panels, in the form of one or more shelves and/or one or more partition walls, wherein the piece of furniture further comprises at least one attachment piece for one or more of the rear wall parts which cooperates with an intermediate panel; wherein the attachment piece comprises an attachment part which engages at one of the intermediate panels, wherein the attachment part is designed as a screw part, which can be screwed down in an opening which has been provided for this purpose in the intermediate panel, wherein the screw part can be screwed down either directly in the material of the intermediate panel or in a bush provided with screw thread being fixed in the opening, wherein the attachment piece further comprises a stop-forming part in the form of a round flange which, in the mounted condition, cooperates with the rear sides of the rear wall parts, wherein the flange comprises a portion in the form of a turning knob, wherein the flange is configured according to a first option or according to a second option, wherein according to the first option, the flange comprises a conical or inclined portion, the inclined side of which, when the attachment piece is screwed down, comes into contact with the edges of the rear wall parts; wherein according to the second option, the flange comprises a support portion, functioning as a tensioning part, with a radial surface, wherein the distance of the radial surface to the central axis of the attachment portion varies in function of the circumference, preferably in that the support portion is elliptical; wherein when the attachment piece is screwed down, a condition is created wherein the radial surface is tensioned between the edges of the two rear wall parts and thus pushes the two rear wall parts apart. wherein the attachment piece comprises an attachment part which engages at one of the intermediate panels, wherein the attachment part is designed as a screw part, which can be screwed down in an opening which has been provided for this purpose in the intermediate panel, wherein the screw part can be screwed down either directly in the material of the intermediate panel or in a bush provided with screw thread being fixed in the opening, wherein the attachment piece further comprises a stop-forming part in the form of a round flange which, in the mounted condition, cooperates with the rear sides of the rear wall parts, wherein the flange comprises a portion in the form of a turning knob, wherein the flange is configured according to a first option or according to a second option, wherein according to the first option, the flange comprises a conical or inclined portion, the inclined side of which, when the attachment piece is screwed down, comes into contact with the edges of the rear wall parts; wherein according to the second option, the flange comprises a support portion, functioning as a tensioning part, with a radial surface, wherein the distance of the radial surface to the central axis of the attachment portion varies in function of the circumference, preferably in that the support portion is elliptical; wherein when the attachment piece is screwed down, a condition is created wherein the radial surface is tensioned between the edges of the two rear wall parts and thus pushes the two rear wall parts apart.