| 1. Round | 07/08/2004 | Sheffield Wednesday | - | Colchester United | 0:3 | ||||
| 2. Round | 10/08/2004 | Colchester United | - | Stockport County | 3:2 | ||||
| 3. Round | 14/08/2004 | Colchester United | - | Peterborough United | 2:1 | ||||
| 4. Round | 21/08/2004 | Chesterfield FC | - | Colchester United | 2:1 | ||||
| 5. Round | 28/08/2004 | Colchester United | - | Doncaster Rovers | 4:1 | ||||
| 6. Round | 30/08/2004 | Hartlepool United | - | Colchester United | 2:1 | ||||
| 7. Round | 04/09/2004 | Colchester United | - | Swindon Town | 0:1 | ||||
| 8. Round | 11/09/2004 | AFC Bournemouth | - | Colchester United | 1:3 |  |
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| 9. Round | 18/09/2004 | Colchester United | - | Milton Keynes Dons | 0:1 | ||||
| 10. Round | 25/09/2004 | Oldham Athletic | - | Colchester United | 1:1 | ||||
| 11. Round | 02/10/2004 | Colchester United | - | Port Vale FC | 2:1 | ||||
| 12. Round | 09/10/2004 | Walsall FC | - | Colchester United | 2:1 | ||||
| 13. Round | 16/10/2004 | Blackpool FC | - | Colchester United | 1:1 | ||||
| 14. Round | 19/10/2004 | Colchester United | - | Wrexham AFC | 1:2 |
England