The apparatus contains a driving unit having a driving source device and a driving shaft, and the driving shaft has a drive-side roller for rotating the object (specimen container). The driving shaft is provided with a one-directional transmission device containing a mechanism for transmitting only rotational driving force in the first direction of the driving shaft to a driven-side part. The apparatus has a mechanism for converting a rotational driving force in the first direction to move a driving unit in a direction away from the object or a mechanism for converting a rotational driving force in the first direction to move a driven unit in a direction away from the object, and the rotational driving force in the second direction of the driving shaft rotates the object.