This pulley comprises a main winding part 2 in which an annular main winding groove 23 is formed between a first flange 21 and a second flange 22 such that a wire W can be wound in the main winding groove 23, and an auxiliary winding part 3 in which an auxiliary winding groove 32 is formed between the second flange 22 and a third flange 31 such that the wire W can be wound in the auxiliary winding groove 32. The auxiliary winding groove 32 has a nearest section 321 that is nearest to the main winding groove 23 in the radial direction of the main winding groove 23, and a curved section 322 that is curved toward the main winding groove 23 in a portion adjacent to the nearest section 321 so as to converge with the main winding groove 23 in the nearest section 321. The third flange 31 has an auxiliary guide part 311 that extends in the radial direction of the auxiliary winding groove 32 so that the groove depth D2 of the curved section 322 is greater than the groove depth D1 of the nearest section 321. Using this structure makes it possible to provide a pulley in which the wire can be easily wound.