A method of manufacturing a hub unit bearing comprising the steps of: preparing a pressing die including a rotation axis (β) that is inclined with respect to a reference axis (α) and including a processing surface portion formed by an inner surface of an annular concave portion centered on the rotation axis (β), axially combining a first member with a second member, the second member having a hole into which the first member is inserted in a direction along the reference axis (α); and relatively rotating the first member and the pressing die with each other about the reference axis (α) to form a staking portion by deforming a part of the first member radially outward, wherein the step of forming the staking portion includes: a first step of applying a load including a load component directed radially outward to the first member using a radially inner portion of the annular concave portion of the pressing die to deform a part of the first member radially outwards; an intermediate step of: (a) displacing the pressing die in an axial direction of the rotation axis (β); or (b) changing an inclination angle of the rotation axis (β) with respect to the reference axis (α); and a second step of applying a load including a load component directed radially inward to a radially outer portion of the first member using a radially outer portion of the annular concave portion of the pressing die, while the radially inner portion of the annular concave portion does not contact the first member. preparing a pressing die including a rotation axis (β) that is inclined with respect to a reference axis (α) and including a processing surface portion formed by an inner surface of an annular concave portion centered on the rotation axis (β), axially combining a first member with a second member, the second member having a hole into which the first member is inserted in a direction along the reference axis (α); and relatively rotating the first member and the pressing die with each other about the reference axis (α) to form a staking portion by deforming a part of the first member radially outward, wherein the step of forming the staking portion includes: a first step of applying a load including a load component directed radially outward to the first member using a radially inner portion of the annular concave portion of the pressing die to deform a part of the first member radially outwards; an intermediate step of: (a) displacing the pressing die in an axial direction of the rotation axis (β); or (b) changing an inclination angle of the rotation axis (β) with respect to the reference axis (α); and a second step of applying a load including a load component directed radially inward to a radially outer portion of the first member using a radially outer portion of the annular concave portion of the pressing die, while the radially inner portion of the annular concave portion does not contact the first member. a first step of applying a load including a load component directed radially outward to the first member using a radially inner portion of the annular concave portion of the pressing die to deform a part of the first member radially outwards; an intermediate step of: (a) displacing the pressing die in an axial direction of the rotation axis (β); or (b) changing an inclination angle of the rotation axis (β) with respect to the reference axis (α); and a second step of applying a load including a load component directed radially inward to a radially outer portion of the first member using a radially outer portion of the annular concave portion of the pressing die, while the radially inner portion of the annular concave portion does not contact the first member.