A wedge-type rope fastening device for an elevator includes: a socket including a through hole formed therethrough, the through hole including a first inner wall surface and a second inner wall surface inclined with respect to the first inner wall surface; and a wedge around which a rope is looped, the wedge including a first outer wall surface and a second outer wall surface inclined with respect to the first outer wall surface, the rope being sandwiched between the first inner wall surface and the first outer wall surface and between the second inner wall surface and the second outer wall surface. An inclination angle of the second outer wall surface relative to the first outer wall surface is larger than an inclination angle of the second inner wall surface relative to the first inner wall surface.