Force sensation is important for manipulating the objects in real space. This paper discusses effects of force feedback on the human operator in a virtual work space. For the virtual work space, we have proposed a new interface device,named SPIDAR(SPace Interface Device for Artificial Reality). It can measure each position of two fingers and give to each finger force-feedback using motors. We made the experiment for the Pick-and-Place task to show the effect of force feedback in the virtual work space with SPIDAR. This task involves the consecutive operations of holding, moving, and putting objects which are common actions of humans.