Abstract: A neck attachment structure of a cathode ray tube comprising a retainer mounted on one side of a shield case assembly for inserting and fixing a circuit board; and a locking band rotatably coupled to the retainer for preventing the loosening of the neck enables the neck to be fixed to the circuit board by applying an incremental tightening force by rotating the locking band. The neck is fixed to the circuit board by soldering and then attached to the shield case assembly. The locking band ensures that the neck is firmly fixed on the circuit board and eliminates the occurrence of cracks at the soldered junction experienced in the prior art, thereby enhancing product reliability.