Portable human-machine interface device intended to be removably connected to a controller (2) of at least one surgical or dental instrument (4), the controller (2) being installed in a power and control unit (6) or a table top equipment (8), the interface device (1) including hardware and software means allowing a user to enter an instruction or data into the interface device (1) to control, via the controller (2), the operation of the surgical or dental instrument (4).
