A surgical device for stabilizing or immobilizing moving tissue

Disclosed is a surgical device (10) for stabilizing or immobilizing moving tissue or for positioning of organs, in particular a portion of a beating heart, attached to a to a base body (12) or attachable flexible arm (14), in particular Gliederarms, in different positions and / or positions and can be brought at its free end at least one retaining element (16) is disposed, and a clamping mechanism (44, 48) through which the arm in a desired position is detectable. The tensioning and / or releasing of the clamping mechanism (44, 48) by means of a manually controllable external power source (22).