This invention relates to a remote lock operation apparatus for a light vehicle having a bar handle and a switch case and having no cabin. One objective of the invention is to make it possible for the infrared receiver of the remote lock operation apparatus to cover a range of directivity without being influenced by the seat or the vehicle body rear portion. Another objective is to protect the infrared receiver from the weather and mischief. These objectives are achieved by having an infrared receiver provided on a switch case, with a switch operation element provided on a steering bar handle of a vehicle, thereby protecting the infrared receiver from potential damage while at the same time positioning it so that it can be easily operable by a passenger.