Abstract: An arm and mouse support for attachment to a table or desk and supporting a mouse, mouse pad and computer user's arm. In a preferred embodiment the arm and mouse support includes a rectangular support plate terminated by a pair of spaced plate clamps and clamp screws for mounting on the front overhang of the desk top. In another embodiment the support plate has a corner clamp which mounts on a corner of the desk top and is fitted with a pair of clamp screws for securing the corner clamp and extending support plate on the desk top. In another embodiment the support plate is hingedly connected to the plate clamps or corner clamp, and pivots from the functional configuration to an inverted configuration, resting on the desk top. In another embodiment the support plate includes a drawer clamp for mounting on a drawer partially extended from the desk.