Abstract: A corkscrew (10) has a handle (12) mounted to a screw stem (14) rotatably guided within a cap (18) which contains upper ends of two prongs (40). The prongs have semi-circular lower ends (48) which surround a screw (16) and comprise inner shoulder stops (64) for engaging on a bottleneck. Upper ends (42) of the prongs are articulated to a core unit (20) having a guide bush (22) for the screw stem (14). Cap (18) may be integral with the handle (12). Alternatively, the handle may be screw-fitted to a tapped stem (84) guided by the cap. Bearing means for the upper prong ends, on which expanding springs (65) bear, find stops at a lower peripheral edge of cap (18). A lug (50) supports each upper prong end (42) on a pin (34) that traverses a guiding cheek (30) on the guide bush (22). Radial bell ribs (44) have lower leading edges (45) in each central portion (46) of the prongs (40).