The present design relates to the main chassis for personal computers that are PCB mounted on the sub-bracket racers.; A main chassis for the personal computer is characterized in that the outer fixing part (20) and an inner fixing part (22) between the sub-PCB (16) of the bracket racer (15) for correcting the both side units (12, 13) is fitted fixed .; Thereby, the effect of the sub-PCB to take advantage of server space, so attached to the bracket racers more efficiently.
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