Abstract: A medical grasper device (10) that is useful for holding and manipulating a body organ is described. Grasper device (10) is inserted into a body cavity through a cannula port and in the form of a flexible strap (26) preferably made of a plastic material having traction formations, in the form of openings (34, 34D), ridges (34C) or scalloped edges (34B) provided along the length of a holding section and serving to prevent the strap from releasing from a position encircling the organ. The strap is housed within a tube (12) that is provided with a handle (68). During the laparoscopic procedure, the strap is moved by hand or by suitable manipulation mechanism out through the opposite, distal end (20) of the tube to define a loop (28) of adjustable size. The loop is thus useful for holding and manipulating body organs and body tissue.