A work device for a microsurgical instrument that includes a proximal coupling portion which can be coupled with a handle. A hollow shaft extends from the coupling portion to a distal tool end on which is positioned a jaw-shaped work apparatus, the work apparatus having two arms which can pivot with respect to one another, and the work apparatus being mounted so that it can rotate about the longitudinal axis of the shaft. In the interior of the shaft a power and torque transmission hose runs from the coupling portion to the distal tool end and is operatively connected with the work apparatus. The power and torque transmission hose is made rigid in at least one portion, situated between the coupling portion and the distal tool end, by at least one pulling element running in the longitudinal direction of the power and torque transmission hose.
