PROBLEM TO BE SOLVED: To keep the still state by an easy adjustment when a monitor is repositioned.SOLUTION: A support arm 50 (monitor support mechanism) for supporting the monitor 20 in a vertically movable manner includes: a base 30 which is connected with a support part an arm member 41 one end of which is connected with the base 30 rotatably in the vertical direction, and the other end of which is connected with the monitor 20 a gas spring (elastic support member) 42 one end of which is connected with the base 30 while the other end of which is connected with the arm member 41, thereby elastically supporting the monitor 20 and the arm member 41 and a rotating member (adjustment mechanism) 43 for adjusting the position of the attachment fulcrum on either one of the ends of the gas spring 42.COPYRIGHT: (C)2013,JPO&INPIT【課題】モニターの変更時に、容易な調整で静止状態を維持する。【解決手段】モニター20を上下方向に移動可能に支持する支持アーム50(モニター支持機構)において、支持部に連結されるベース部30と、一端がベース部30に上下方向に回動可能に連結され、他端がモニター20に連結されるアーム部材41と、一端がベース部30に連結され、他端がアーム部材41に連結され、モニター20及びアーム部材41を弾性支持するガススプリング(弾性支持部材)42と、ガススプリング42の何れか一端側の取付支点位置を調整する回転部材(調整機構)43と、を備える。【選択図】図6