Fitting system for an item of seating furniture, comprising - a base segment for the fixed or rotatable attachment to a floor-side part of the item of seating furniture, - a seat surface segment for the attaching of a seat surface, and - a leg support segment for the attaching of a leg support surface, wherein - the seat surface segment is displaceable in relation to the base segment, - the leg support segment is pivotable between a storage position under the seat surface segment and a use position in front of the seat surface segment, and - the relative position of the seat surface segment with respect to the base segment and the relative position of the leg support segment with respect to the base segment are forcibly coupled to each other, and wherein the seat surface segment is connected to the base segment by means of at least one first bracket, wherein the first bracket - is pivotable in relation to the base segment about a first pivot axis which is positionally fixed with respect to the base segment and to the first bracket, and - is pivotable in relation to the seat surface segment about a second pivot axis which is fixed in position with respect to the seat surface segment and with respect to the first bracket and is spaced apart in relation to the first pivot axis, characterized in that the leg support segment - is pivotable in relation to the base segment about a third pivot axis which is positionally fixed with respect to the base segment and to the leg support segment, and - is connected to the seat surface segment by means of a second bracket, wherein the second bracket - is pivotable in relation to the leg support segment about a fourth pivot axis which is positionally fixed with respect to the leg support segment and to the second bracket, and - is pivotable in relation to the leg support segment about a fifth pivot axis which is positionally fixed with respect to the seat surface segment and to the second bracket. - a base segment for the fixed or rotatable attachment to a floor-side part of the item of seating furniture, - a seat surface segment for the attaching of a seat surface, and - a leg support segment for the attaching of a leg support surface, - the seat surface segment is displaceable in relation to the base segment, - the leg support segment is pivotable between a storage position under the seat surface segment and a use position in front of the seat surface segment, and - the relative position of the seat surface segment with respect to the base segment and the relative position of the leg support segment with respect to the base segment are forcibly coupled to each other, - is pivotable in relation to the base segment about a first pivot axis which is positionally fixed with respect to the base segment and to the first bracket, and - is pivotable in relation to the seat surface segment about a second pivot axis which is fixed in position with respect to the seat surface segment and with respect to the first bracket and is spaced apart in relation to the first pivot axis, - is pivotable in relation to the base segment about a third pivot axis which is positionally fixed with respect to the base segment and to the leg support segment, and - is connected to the seat surface segment by means of a second bracket, wherein the second bracket - is pivotable in relation to the leg support segment about a fourth pivot axis which is positionally fixed with respect to the leg support segment and to the second bracket, and - is pivotable in relation to the leg support segment about a fifth pivot axis which is positionally fixed with respect to the seat surface segment and to the second bracket. - is pivotable in relation to the leg support segment about a fourth pivot axis which is positionally fixed with respect to the leg support segment and to the second bracket, and - is pivotable in relation to the leg support segment about a fifth pivot axis which is positionally fixed with respect to the seat surface segment and to the second bracket.