Adapter for attaching objects to a vehicle

An adapter for attaching an object to a vehicle, which adapter comprises at least one upper part and at least one lower part, wherein the upper part is configured to be attached to an object and the lower part is configured to be attached to a portion of a vehicle, wherein the upper part comprises at least two attachment devices that can be moved in opposite directions relative to each other to attach the upper part to the lower part in a removable manner, wherein each attachment device comprises at least one catch element, wherein the upper part is moved towards the lower part along at least one attachment direction to attach the upper part to the lower part, wherein the catch element protrudes from the inside towards the outside of the upper part, wherein, when the upper part is attached to the lower part, the catch element attaches to the lower part from the inside towards the outside of the lower part and is partially housed in a seat of the lower part which is open towards the inside of the lower part, wherein the seats of the lower part are formed in one or more extensions of the lower part which have an elongated shape and are arranged on at least two sides of the lower part.