An offshore platform device comprising a platform and a docking device which has a vertically oriented longitudinal axis (L) and is designed to be raised along its longitudinal axis (L) relative to the platform (3) into a transport position and to be lowered into an operational position, the docking device (4) having at its lower end at least one docking point (8a, 8b, 8c, 8d) which is accessible from a boat (11) in the operational position.