An arm structure for movably supporting a display apparatus, the arm structure comprising: a base part; a movement frame configured for a predetermined load to be applied thereto; a first link to connect the movement frame and the base part, the first link being rotatably connected with respect to a first rotational axis of the base part so that the movement frame is movable relative to the base part and a first torque acts on the first rotational axis due to the load being applied to the movement frame; an elastic compensation member elastically deformable and having a first end portion connected to the base part, the elastic compensation member providing the first rotational axis with a second torque acting in an opposite direction to the first torque in order to compensate for the first torque; a compensation member supporting portion having a first end portion that is rotatably connected to a second rotational axis of the movement frame and a second end portion that is movable with respect to the first link and supports a second end portion of the elastic compensation member which is not fixed to the first link; characterised by a distance variation guide configured to vary a distance between the second end portion of the elastic compensation member and the first link in a direction perpendicular to a length direction of the first link, configured such that while the movement frame is being moved, the first link is rotated with respect to the first rotational axis, and the compensation member supporting portion rotates with respect to the second rotational axis, and the second end portion of the elastic compensation member is moved with respect to the first link in the length direction of the first link and in the direction perpendicular to the length direction of the first link. a base part; a movement frame configured for a predetermined load to be applied thereto; a first link to connect the movement frame and the base part, the first link being rotatably connected with respect to a first rotational axis of the base part so that the movement frame is movable relative to the base part and a first torque acts on the first rotational axis due to the load being applied to the movement frame; an elastic compensation member elastically deformable and having a first end portion connected to the base part, the elastic compensation member providing the first rotational axis with a second torque acting in an opposite direction to the first torque in order to compensate for the first torque; a compensation member supporting portion having a first end portion that is rotatably connected to a second rotational axis of the movement frame and a second end portion that is movable with respect to the first link and supports a second end portion of the elastic compensation member which is not fixed to the first link; characterised by a distance variation guide configured to vary a distance between the second end portion of the elastic compensation member and the first link in a direction perpendicular to a length direction of the first link, configured such that while the movement frame is being moved, the first link is rotated with respect to the first rotational axis, and the compensation member supporting portion rotates with respect to the second rotational axis, and the second end portion of the elastic compensation member is moved with respect to the first link in the length direction of the first link and in the direction perpendicular to the length direction of the first link.