A piece of seating and/or reclining furniture comprising a base frame with a front end and a rear end opposite the front end , a seating or reclining surface which has a main plane of extension and comprises one or more seating or reclining elements , and a backrest which comprises one or more backrest elements , wherein - the seating or reclining surface and the backrest are each arranged on the base frame , - at least one seating or reclining element is rotatably attached to the base frame , wherein the at least one seating or reclining element is rotatable with respect to the base frame and about an axis of rotation (R) which is directed substantially perpendicularly to the main plane of extension of the seating or reclining surface , - at least one backrest element is adjustably attached to the base frame , wherein the position of the at least one backrest element is adjustable with respect to the base frame by changing the distance of the at least one backrest element (301 a, 301b) to the front end of the base frame , wherein the at least one backrest element is attached to the base frame via a pivoting mechanism , and - the front end and the rear end of the base frame each extend along a width direction (B) of the piece of seating and/or reclining furniture and transversely to a depth direction (T) of the piece of seating and/or reclining furniture , and the width direction (B) and the depth direction (T) each extend parallel to the main plane of extension of the seating and/or reclining surface , characterized in that the pivoting mechanism comprises at least one pivoting arm , the first end of which is attached to the at least one backrest element so as to be pivotable about a first pivot axis and the second end of which is attached to the base frame so as to be pivotable about a second pivot axis, wherein the first pivot axis and the second pivot axis extend substantially parallel to the width direction (B) of the piece of seating and/or reclining furniture . - the seating or reclining surface and the backrest are each arranged on the base frame , - at least one seating or reclining element is rotatably attached to the base frame , wherein the at least one seating or reclining element is rotatable with respect to the base frame and about an axis of rotation (R) which is directed substantially perpendicularly to the main plane of extension of the seating or reclining surface , - at least one backrest element is adjustably attached to the base frame , wherein the position of the at least one backrest element is adjustable with respect to the base frame by changing the distance of the at least one backrest element (301 a, 301b) to the front end of the base frame , wherein the at least one backrest element is attached to the base frame via a pivoting mechanism , and - the front end and the rear end of the base frame each extend along a width direction (B) of the piece of seating and/or reclining furniture and transversely to a depth direction (T) of the piece of seating and/or reclining furniture , and the width direction (B) and the depth direction (T) each extend parallel to the main plane of extension of the seating and/or reclining surface , <EOS>