The 1978 FIBA Intercontinental Cup William Jones was the 12th edition of the FIBA Intercontinental Cup for men's basketball clubs.

It took place at Buenos Aires.

From the FIBA European Champions Cup participated Mobilgirgi Varèse and Real Madrid, from the South American Club Championship participated EC Sírio and Obras Sanitarias, and from the Division I (NCAA) participated the Rhode Island Rams.

Day 1, June 19, 1978 Day 2, June 20, 1978 Day 3, June 22, 1978 Day 4, June 23, 1978 Day 5, June 24, 1978