At least three or more arm members connected to each other and fixed at one end of the arm member at the end thereof and changing the fixing position, in a support device capable of easily changing the position thereof with one hand with one hand , And a fixing member fixed to the opposite side of the fixed portion of the operating portion and fixing the supported member, and the adjacent arm members are connected to each other at joint portions of the end portions thereof A first rotating part is provided on one of the arm members and a second rotating part is provided on the other of the arm members at each connecting part so that the pivoting A first rotation restricting member is fixed to one of the first rotation restraining member and the second rotation restraining member is provided movably on the other and biasing means for biasing the second rotation restraining member toward the operation portion side is provided, By operating the operating part, all the second rotation restricting members are simultaneously moved so that the first rotation restricting member When the second rotation restricting member abuts, the rotation at the connecting portion is restrained, and when the first rotation restricting member and the second rotation restraining member are separated from each other, the connecting portion rotates I made it possible.被支持部材を片手で、容易にその位置を変えることができる支持装置において、それぞれ接続された少なくとも3個以上の腕部材と、その端の前記腕部材の一端に固設され固定位置を変更するための操作部と、その操作部の固設された側と反対側に固設され被支持部材を固定する固定部材と、を有し、隣接する腕部材同士は、その端部の連結部で腕部材の軸線と直交する軸線を中心として回動可能に連結され、各連結部において、腕部材の一方には第1回動部を、他方には第2回動部を設け、それら回動部の一方に第1回動抑制部材を固設し、他方には第2回動抑制部材を移動可能に設け、第2回動抑制部材を操作部側に付勢する付勢手段を設け、操作部の操作により、全ての第2回動抑制部材を同時に移動するようにし、第1回動抑制部材と第2回動抑制部材が当接した際に、連結部での回動が抑制され、第1回動抑制部材と第2回動抑制部材とが離間した際に、連結部で回動することができるようにした。
