Abstract: A fastening device for detachable mounting of a shopping basket or a child seat on the handle (5) of a pram or a shopper's trolley is described. The fastening device includes a cross rail (3) being placed across two mainly parallel parts of the handle and furthermore comprises a hook shaped organ (2) for mounting around the part of the handle (5) connecting the mainly parallel parts. The shopping basket's (4) or child seat's angle in proportion to the handle (5) is regulated by means of a regulating mechanism (6).