A bicycle electronic controller has a body with a push-operated switch, a manual actuation member for issuing a command, and a motion transmission device interposed between the manual actuation member and the switch. The motion transmission device includes a guide element which is provided with a filiform through cavity and has a first end fixed in proximity to the manual actuation member and a second end fixed in proximity to the switch. A longitudinally, substantially incompressible filiform body is slidingly guided within the guide element and has a first end pushed by actuation of the manual actuation member and a second end that pushes on the switch. The switch is housed within the electronic controller body where a tight insulation can be achieved in addition to arranging the actuation member where it is more ergonomic.