To provide dislocation preventing means for a catalyst carrier, capable of completely eliminating the dislocation of the catalyst carrier to be just in contact with a catalyst converter for an internal combustion engine, without giving damage thereto, and easy to apply to a catalyst carrier having a different size.

The catalyst carrier 20 is stored in a tubular converter body 10. A stopper 30 separate from the converter body 10 is provided on the inner periphery face of the converter body 10 at the end side of the catalyst carrier 20.