The present invention relates to a locking device, which is capable of directly locking the body of a means of transportation, such as a bicycle or a light electric vehicle (LEV), regardless of the shape or size thereof, and to a locking device for a means of transportation, which is provided with a mount simply and securely mounted on a tubular frame of the means of transportation, wherein a rack is provided with brackets coupled to the mount and provided at one end of articulated cables, which are fixed to a fixture, so that not only is the locking device securely locked simply by coupling the brackets provided on the rack to the mount mounted on a user's means of transportation, even if the user does not carry a separate lock, but a coupling means, which is capable of disassembling the mount, is covered by the coupling with the brackets when the locking device is locked, thereby significantly reducing the risk of theft during parking.