The structure and performance of a three-dimension movable target holder used in nuclear reaction experiments are described. A target supporter including six target positions is mounted on the top of a conveyer

the movement of which is controlled by a digital eletrical console. The vertical and horizontal displacements of the supporter as well as its rotation round the beam axis can be realized

with a translation error of less than 0.3mm and a rotation error of less than 0.2°

respectively. A wanted target can be easily chosen by vertically moving the supporter and the dead detection zone can be avoided by appropriately turning the supporter.