34° Campeonato Argentino de Mayores
Countries	Argentina
Number of teams	15
Champions	Buenos Aires (15th title)
Runners-up	Unión de Rugby de Rosario
← 1977 1978 →

TheCampeonato Argentino de Rugby 1978 was won by the selection ofBuenos Aires that beat in the final the selection ofUnión de Rugby de Rosario

• The selection of Buenos Aires won also the "Campeonato Juvenil" (under-19)
• TheBuenos Aires Championship was won bySan Isidro Club
• TheCordoba Province Championship was won byLa Tablada
• TheNorth-East Championship was won byTucumán RC

• 1978 is an important year for Argentine rugby : the "Pumas" made a tour in Europe. They obtain an historical draw with England, beat Wales "B" andLeinster. But in the end they lost surprising with Italy
  Main article:1978 Argentina rugby union tour of Britain, Ireland and Italy

Score system: Try= 4 points, Conversion=2 points .Penalty and kick from mark= 3 points. Drop= 3 points.

Rosario: 15.D. Baetti (M. Dip), 14.A. Nogués, 13.R. Rodríguez, 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. Rodríguez), 2. V. Macat, 1. R. Imhoff,
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.

• Memorias de la UAR 1978
• (in Italian) Francesco Volpe, Paolo Pacitti (Author),Rugby 2000, GTE Gruppo Editorale (1999)

• Campeonato Argentino de Rugby
• 1977–78 rugby union tournaments for clubs
• 1978 in Argentine sport

• Use dmy dates from November 2018
• Articles containing Spanish-language text
• Pages using infobox rugby union season with unknown parameters
• Articles with Italian-language sources (it)