Fixing method and fixing apparatus

This invention provides a fixing method for fixing a member to be fixed that is inserted into a shaft member, the fixing method comprising the steps of: forming an annular groove in an outer circumference of the shaft member; inserting the member to be fixed into the shaft member until the member to be fixed contacts a step portion provided in the shaft member; inserting a locking member into the shaft member until the locking member contacts the member to be fixed; and caulking the locking member to the shaft member such that one end of the locking member is brought into press contact with the member to be fixed and an inner circumference portion of the other end of the locking member comes into contact with the annular groove.