The invention provides a support arm for an apparatus, preferably for a display screen, comprising a first fastening part for attachment to a frame or a wall, a first member, at one end coupled to the first fastening part and at another end coupled to a first pivot joint which allows rotation about a first axis of rotation, a second member which, at a first end, is coupled to the first pivot joint, and, at a second end, is provided with a second pivot joint which allows rotation about a second axis of rotation, a second fastening part for attaching the apparatus to the support arm, coupled to the second pivot joint, the first and second axes of rotation essentially being parallel to one another. The second fastening part is connected to a substantially L-shaped third member via a third pivot coupled to the second pivot joint.