The 1978 Irish Masters was the fourth edition of the professional invitational snooker tournament (and the first under the Irish Masters name) which took place from 8 to 10 March 1978. The tournament was played at Goffs in Kill, County Kildare, and featured six professional players. The first round was played in two groups: Reardon, Spencer and Miles in Group A, Higgins, Mountjoy and Dennis Taylor in Group B. John Spencer won the title for the third time, beating Doug Mountjoy 5–3 in the final.

Main draw

RR play-off 1 frameSemi-finals Best of 5 framesFinal Best of 9 frames
England John Spencer3
Northern Ireland Alex Higgins1Northern Ireland Alex Higgins1
Northern Ireland Dennis Taylor0England John Spencer5
Wales Doug Mountjoy3
Wales Doug Mountjoy3
Wales Ray Reardon2