| Year: | 1978 |
| Num Teams: | 6 |
| Confederations: | 1 |
| Venues: | 1 |
| Cities: | 1 |
| Champion Other: | Malaysia |
| Count: | 4 |
| Second: | Singapore |
| Prevseason: | 1977 |
| Nextseason: | 1979 |
The 1978 King's Cup finals were held in Bangkok. This edition once again reverted to two groups of 3 teams. The winners and runners up advance.
Thailand entered this edition with an 'A' and 'B' squads. Indonesia was represented by clubside Persib.
| width=5% | Group A | width=5% | Group B |
|---|---|---|---|
| (host country) | B Selection |
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Results unknown
----Singapore advanced, result unknown