An elevator comprising an elevator car (1); a plurality of belt-shaped ropes (3a,3b,3c) connected to the car (1), each having a width larger than thickness as measured in transverse direction of the rope; and at least one rope wheel (5, 6), around which the belt-shaped ropes (3a,3b,3c) pass; wherein the rope wheel (5, 6) comprises a plurality of circumferential rope contact areas (A, B, C) distributed in axial direction thereof, one of said ropes (3a,3b,3c) passing against each circumferential rope contact area (A, B, C), the elevator further comprising a sensing arrangement (20, 30) for sensing displacement of one or more of said ropes (3a,3b,3c), comprising a sensing member (23, 33) for sensing displacement of one or more of said ropes (3a,3b,3c) radially outwards from the rope wheel (5,6), extending in axial direction of the rope wheel (5, 6) along its surface at a radial distance therefrom, whereby a gap (g) is formed between the sensing member (23, 33) and each rope contact area (A, B, C), the height (h) of the gap (g) being more than thickness (t) of the belt-shaped ropes (3a,3b,3c) and less than 2.2 times the thickness of the belt-shaped ropes (3a,3b,3c); sensing member (23, 33) being displaceable by a rope (3a,3b,3c) colliding into contact with it, and the sensing arrangement (20, 30) is arranged to trigger one or more predefined action in response to displacement of the sensing member (23, 33).