A medical support device includes an arm having a drill attached at a tip part of the arm, a first position obtainer obtaining a representative position of the drill attached to the arm, a second position obtainer obtaining a bury start position, and a controller. The controller controls the arm and applies a burying reaction force to the drill in a burying direction, i.e., a direction from the bury start position to an inside of a implant area, when the representative position of the drill obtained by the first position obtainer is at the inside of the implant area relative to the bury start position.