A lockable vehicle retaining apparatus is provided for securing of a vehicle such as a motorcycle to a conveyance vehicle or to a fixed position mounting structure. It comprises a base structure including a pair of horizontal, superposed plates, an elongated post secured at it's one end to the top plate and extending orthogonally upwardly therefrom terminating in an upper end and a vehicle connector secured to that upper end. Attachment devices extend through the bottom plate for securing an apparatus to either a conveyance vehicle or a mounting structure with their heads located between the plates where they cannot be accessed without the plates being separated. Separation of the plates is enabled by their pivotal interconnection along one edge by a hinge structure when the vehicle is not locked to the apparatus. The vehicle connector includes a pair of interfitting U-shaped brackets that receive a component of the vehicle in securing relationship. A locked device secures the brackets together. The post is axially reciprocable to enable the apparatus to accommodate vehicles of different sizes and is formed of two cooperative interlocking devices that prevent their separation.