A cross shaft joint (6) includes a bearing cup (24), a cross shaft (23), and a joint yoke (20). The bearing cup (24) includes a cylindrical portion (48) in which an opening portion (50) for receiving a shaft portion (46) is formed in one end of the bearing cup in an axis direction, and a bottom portion (49) that closes the other end of the cylindrical portion (48) in the axis direction. The bearing cup (24) is press-fitted into the fitting hole (31,42) and supports the shaft portion (46) through a rolling element (53) so that the shaft portion (46) is able to rotate. The bearing cup (24) is fitted onto the shaft portion (46) inside the fitting hole (31, 42) and holds the rolling element (53) with the shaft portion (46). A diameter of an inner peripheral surface (48A) of the cylindrical portion (48) is smaller on the opening portion (50) side than the bottom portion (49) side in a free state of the bearing cup (24) before being press-fitted into the fitting hole (31, 42).
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