The invention relates to a side support for a postural support seat, comprising at least one support element for exerting a force on a user sitting in the postural support seat at least a first hinge element and at least a second hinge element forming a joint-link chain, wherein the support element is attached to a first end of the joint-link-chain and at least one attachment element, wherein a second end of the joint-link-chain, being opposite to the first end is connected to the attachment element, and wherein the attachment element is adapted to be connected to the postural support seat.
