A kind of wheelchair of adjustable size includes a chassis,A seat cushion group in conjunction with chassis and the chair back group in conjunction with seat cushion group,One elevating mechanism is wherein set on chassis,Elevating mechanism interlocks in conjunction with seat cushion group,Elevating mechanism and a screw rod are pivotally connected,When the screwed pipe rotation being spirally connected with screw rod,Screw rod system pushes elevating mechanism actuation,Thus elevating mechanism interlocks seat cushion group adjustment of displacement height,And chair back group adjustment of displacement is interlocked,And at a distance from the elevating mechanism Hou wheel adjustment of displacement and the front-wheel that interlock chassis and have separate,The wheelchair of this creation is adjusted using the various pieces of single screw rod simultaneous linkage wheelchair to the size of suitable occupant's figure.一種可調整尺寸的輪椅包括一底盤，與底盤結合的一座墊組以及與座墊組結合的一椅背組，其中底盤上設置一升降機構，升降機構與座墊組結合而連動，升降機構與一螺桿樞接，當與螺桿螺接的一螺管轉動時，螺桿係推動升降機構作動，因而升降機構連動座墊組位移調整高度，並且連動椅背組位移調整，以及升降機構連動底盤具有的後輪位移調整與前輪隔開的距離，本創作的輪椅利用單一的螺桿同時連動輪椅的各個部分調整至適合乘坐者體型的尺寸。
