Sheave for elevator

Provided is an elevator rope pulley, with a diameter D (mm), wherein, a suspender with an longitudinal elasticity modulus Es (N/mm2) and Poisson ratio nu(s), the elevator adopts a diameter of d (mm), and is coated with a resin suspender with the longitudinal elasticity modulus Er (N/mm2) and Poisson ratio nu(r), and is driven by a suspender tension T (N); the suspender groove surface of the elevator rope pulley has a coating, assuming that the minimum contact surface pressure which can maintain the required friction coefficient between the suspender and the rope pulley is p[1mt] (N/mm2) at a state that lubricant oil exists between the contact face of the suspender and rope pulley, assuming that the maximum pressing amount is delta[1mt] when the wear amount of outer layer resin of the suspender is controlled below the allowable value under the situation that the contact face of the two parts is at a cleaning state, the number of the protuberance on the surface of the coating coated on the suspender groove surface of the rope pulley is N in each mm2, the front end radius of the protuberance is homologous to the radial length r (mm), and the surface roughness Ra formed by the protuberance group satisfies, (Ra) min<=Ra<= (Ra ) max (mm).