A method for manufacturing a pulley for a belt-type continuously variable transmission, the method comprising: a step (S1) of preparing a cylindrical boss extending in a first direction (A1); a step (S2, S3) of forming a groove on an outer circumferential surface of the boss , wherein the groove has a first surface that is a slope inclined from the first direction (A1), a second surface that is a slope inclined from a second direction (A2), wherein the second direction (A2) is an opposite direction to the first direction (A1), a third surface that is a slope inclined from a third direction (A3), wherein the third direction (A3) is a circumferential direction along a circumferential surface of the boss, and a fourth surface that is a slope inclined from a fourth direction (A4), wherein the fourth direction (A4) is an opposite direction to the third direction (A3); a step (S5) of preparing a sheave , wherein the sheave comprises a proximal portion that has an inner circumferential surface and an outer circumferential surface and extends in the first direction (A1), and a main body portion that is located radially outward (R1) relative to the proximal portion and configured to support a belt ; a pre-press step (S6) of aligning the inner circumferential surface of the proximal portion of the sheave with the groove on the outer circumferential surface of the boss ; and a step (S7) of pressing the outer circumferential surface of the proximal portion of the sheave toward a radially inward direction, thereby plastically deforming the proximal portion until a portion of the proximal portion of the sheave is fitted into the groove of the boss and the sheave is joined to the boss . a step (S1) of preparing a cylindrical boss extending in a first direction (A1); a step (S2, S3) of forming a groove on an outer circumferential surface of the boss , wherein the groove has a first surface that is a slope inclined from the first direction (A1), a second surface that is a slope inclined from a second direction (A2), wherein the second direction (A2) is an opposite direction to the first direction (A1), a third surface that is a slope inclined from a third direction (A3), wherein the third direction (A3) is a circumferential direction along a circumferential surface of the boss, and a fourth surface that is a slope inclined from a fourth direction (A4), wherein the fourth direction (A4) is an opposite direction to the third direction (A3); a step (S5) of preparing a sheave , wherein the sheave comprises a proximal portion that has an inner circumferential surface and an outer circumferential surface and extends in the first direction (A1), and a main body portion that is located radially outward (R1) relative to the proximal portion and configured to support a belt ; a pre-press step (S6) of aligning the inner circumferential surface of the proximal portion of the sheave with the groove on the outer circumferential surface of the boss ; and a step (S7) of pressing the outer circumferential surface of the proximal portion of the sheave toward a radially inward direction, thereby plastically deforming the proximal portion until a portion of the proximal portion of the sheave is fitted into the groove of the boss and the sheave is joined to the boss . <EOS>