The 1987-88 Welsh Cup winners were Cardiff City. The final was played at the Vetch Field in Swansea in front of an attendance of 5,465.
| Tie no | Home team | Score | Away team | |
|---|---|---|---|---|
| 1 | Cardiff City | 2–1 | Caernarfon Town | |
| 2 | Kidderminster Harriers | 1–2 | Wrexham |
| Tie no | Home team | Score | Away team | |
|---|---|---|---|---|
| 1 | Caernarfon Town | 0–1 | Cardiff City | |
| 2 | Wrexham | 3–2 | Kidderminster Harriers |