Campeonato Nacional
Format: 20 teams divided into 2 groups of 10, the top 2 teams in each group went to direct elimination. Both semi-finals and final were single match, played on neutral venue. Participants: 14 teams from Metropolitano league – the to 12 in the final standing plus 2 qualified in the 'petit' tournament; 6 provincial teams – all of them had to qualified in 2 tournaments: one was for the 'stronger' provinces of Tucuman, Mendoza, Gran Mendoza, and the city of Mar del Plate. 4 teams came from those qualifications. The rest of the interior provided 2 teams.
Campeonato Nacional [National Championship] 1970 
Table:
Group A
No. Team                     G    W    D    L    Gf    Ga    P
--------------------------------------------------------------
 1. Chacarita Juniors       20   13    3    4    25    19   29 Semifinalist
 2. Gimnasia y Esgrima LP   20   12    3    5    46    31   27 Semifinalist
    ----------------------------------------------------------
 3. River Plate             20   11    4    5    30    20   26
 4. San Lorenzo de Almagro  20   11    2    7    45    26   24
 5. Gimnasia y Egrima M     20   10    3    7    33    32   23
Standing from left:  Wolff, Cejas, Basile, Chabay, Aguirre, Rulli 
Crouching: Perfumo, Cardenas, Machado Da Silva, Adorno, Lamelza
 6. Racing Club             20    5    7    8    35    30   17
 7. Newell's Old Boys       20    5    5   10    29    36   15
 8. Talleres (C)            20    4    7    9    27    42   15
 9. San Martín (T)          20    5    4   11    19    37   14
10. Platense (VL)           20    3    4   13    21    46    8
Group B
 1. Rosario Central         20   13    3    4    42    26   29 Semifinalist
 2. Boca Juniors            20   13    3    4    36    20   29 Semifinalist
    ----------------------------------------------------------
 3. Vélez Sarsfield         20    9    7    4    39    24   25
 4. Independiente (A)       20    9    3    8    37    35   21
 5. Estudiantes LP          20    7    6    7    31    22   20
 6. Banfield                20    6    6    8    29    29   18
 7. Atlanta                 20    5    6    9    17    22   16
 8. Kimberley (MdP)         20    4    7    9    33    41   15
Standing from left:  Peralta, Taritolay, Allier, Roldán, Salinas, Torres. Crouching: Cáceres, Quevedo, Siaccia, Cerrizuela, Herrera.
 9. Gimnasia y Esgrima J    20    4    6   10    27    43   14
10. San Martín (SJ)         20    4    5   11    27    47   13
Semifinals
Standing: Roberto Rogel, Julio Meléndez (Peru), Antonio Roma, Rubén Suñé, Norberto Madurga, Silvio Marzolini.
Crouching: I. Peña, Raúl Savoy, Angel Clemente Rojas, Orlando Medina, Aldo Villagra. 
  1. Boca Juniors            1    1    0    0     2     0    2 Finalist
Standing: Marcos, Poncio, Zurita, Eresuma, García Cambón, Neumann.
Crouching: Petrocelli, Buzzo, Ortiz, Frassoldatti,Bargas.
  2. Chacarita Juniors       1    0    0    1     0     2    0
  1. Rosario Central         1    1    0    0     3     0    2 Finalist
  2. Gimnasia y Esgrima LP   1    0    0    1     0     3    0
Final
  1. Boca Juniors            1    1    0    0     2     1    2 Champion
  2. Rosario Central         1    0    0    1     1     2    0Boca Juniors – winner of Campeonato Nacional.
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