To provide a fitting method by which grooving of an end member is unnecessitated and also variation of concentricity after caulking is reduced in the case of fitting the end member to a hollow shaft member for OA equipment.

In the method for fitting the end member to the hollow shaft member for OA equipment by which the end member having an outside diameter which is equal to the inside diameter of the hollow shaft is inserted in the end part of the hollow shaft and the hollow shaft and the end member are fixed by caulking the inserted part from the outside in a plurality of places of the hollow shaft, one or more lines of knurling are applied at proper intervals of the part to be inserted in the hollow shaft of the end member before inserting the end member in the hollow shaft, next, the knurled end member is forced into the hollow shaft and furthermore the hollow shaft is caulked in a plurality of places from the outside of the streaked part formed on the inside of the hollow shaft in the rear of the knurled part of the end member.