The Campeonato Argentino de Rugby 1978 was won by the selection of Buenos Aires that beat in the final the selection of Unión de Rugby de Rosario
<br/>
<br/>
<br/>
<br/>
<small> Score system: Try= 4 points, Conversion=2 points .Penalty and kick from mark= 3 points. Drop= 3 points. </small>
Rosario: 15.D. Baetti (M. Dip), 14.A. Nogués, 13.R. RodrÃÂguez, 12.G. Torno, 11.C. Bisio, 10.J. Escalante, 9.R. Castagna, 8.D. Poet, 7.R. Seaton, 6. Risler (cap.), 5. C. Svetaz, 4.G. Sinópoli, 3. F. Semino (F. RodrÃÂguez), 2. V. Macat, 1. R. Imhoff, <br/> Buenos Aires: 15.M. Sanzot, 14.M. Campo, 13.R. Madero, 12.J. Trueco, 11.A. Puccio, 10.H. Porta (cap.), 9. R. Landajo, 8.T. Petersen, 7.C. Serrano, 6.H. Silva, 5.S. Iachetti, 4.G. Travaglini, 3.H. Nicola, 2.A. Cubelli, 1.A. Cerioni.