The 478 is a bus route in Argyll and Bute, Scotland, which runs between Dunoon and Portavadie via Tighnabruiach and Kames.

[4] Given the distance covered by the route (28 miles (45 km)), it only runs eight times a day, Monday to Saturday (four in the morning and four in the afternoon).

[6][7] On weekdays, additional stops in Dunoon, Hunters Quay, Ardnadam and Sandbank occur in the mid-afternoon to support the release of children from local schools.

It then turns south on the A886 en route to the MV Loch Dunvegan for the short ferry crossing between Colintraive and Rhubodach on the Isle of Bute.

The bus retraces its route to the north and continues past the junction with the B836, before looping around Loch Ruel to Tighnabruiach, Millhouse[8] and Portavadie.