Abstract: Chair assembly, in particular a chair assembly for use in virtual reality devices, comprising a substructure which comprises a stationary bottom frame and situated above it a top frame bearing a chair, movement means being present between the bottom frame and the top frame, in order to make the top frame move relative to the bottom frame, which movement means comprise drive means and a connecting arm of fixed length which interacts hingedly by way of a top hinge axis with the top frame and hingedly by way of a bottom hinge axis with the bottom frame, wherein the top hinge axis and the bottom hinge axis extend substantially parallel to each other.