1. An insert (10) fit for the prosthesis to the stump (2) comprising an elastic main body (11) which has a proximal opening (12) for insertion of the stump (2) in the receiving space (13) and a distal end (14), characterized in that on the outer side (15) of the insert (10) of the prosthesis is located at least one vacuum suction cup (30) .2. The liner of the prosthesis of claim. 1, characterized in that the vacuum suction cup (30) is formed as a separate part and is fixed on the insert (10) proteza.3. The liner of the prosthesis according to Claim. 1 or 2, characterized in that the vacuum suction cup (30) is fixed reversibly on the distal kontse.4. The liner of the prosthesis according to Claim. 1 or 2, characterized in that at the distal end (14) is stable in form protective cap (16) .5. The liner of the prosthesis according to Claim. 1 or 2, characterized in that the vacuum suction cup (30) has at least one circumferential sealing lip (31) .6. The liner of the prosthesis of claim. 5, characterized in that the inside circumferential sealing lip (31) on the surface (32) vacuum-suction structure provided roughened, textiles and / or does not adhere pokrytie.7. The liner of the prosthesis according to Claim. 1 or 2, characterized in that the vacuum suction cup (30) has on the side facing the insert (10) the convex side of the prosthesis formu.8. The liner of the prosthesis of claim. 7, characterized in that the vacuum suction cup (30) is configured to invert from a convex shape in the initial state in the concave formu.9. The liner of the prosthesis according to Claim. 1 or 2, characterized in that between the receiving space (13) and a vacuum suction cup (30) provides compound (40) according to potoku.10. The insert of claim prosthesis. 9, characterized in that in the compound (40) is arranged downstream of the blocking device (41) which prevents backflow into the receiving space (13) .11. The liner of the prosthesis according to Claim. 1 or 2, characterized in that
