| Argentina | |
| Nickname: | Los Leoncitos (The Little Lions) |
| Association: | Argentine Hockey Confederation (Confederación Argentina de Hockey) |
| Confederation: | PAHF (Americas) |
| Coach: | Juan Ignacio Gilardi |
| Assistant: | Ignacio Ortiz |
| Manager: | Guido Barreiros |
| Captain: | Tomas Ruiz |
| Pattern La3: | _whitelower |
| Pattern B3: | _thickwhitestripes |
| Pattern Ra3: | _whitelower |
| Leftarm3: | 87CEFA |
| Body3: | 87CEFA |
| Rightarm3: | 87CEFA |
| Shorts3: | ffffff |
| Socks3: | ffffff |
| Pattern La4: | _thinwhiteborder |
| Pattern B4: | _whitecollar |
| Pattern Ra4: | _thinwhiteborder |
| Leftarm4: | 000066 |
| Body4: | 000066 |
| Rightarm4: | 000066 |
| Shorts4: | 000066 |
| Socks4: | 000066 |
| Regional Name: | FIH Hockey Junior World Cup |
| Regional Cup Apps: | 13 |
| Regional Cup First: | 1979 |
| Regional Cup Best: | 1st (2005, 2021) |
| 2Ndregional Name: | Pan American Junior Championship |
| 2Ndregional Cup Apps: | 14 |
| 2Ndregional Cup First: | 1978 |
| 2Ndregional Cup Best: | 1st (1978, 1981, 1985, 1988, 1992, 1996, 2000, 2005, 2008, 2012, 2016, 2023, 2024) |
The Argentina men's national under-21 field hockey team represents Argentina in men's international under-21 field hockey competitions and is controlled by the Argentine Hockey Confederation, the governing body for field hockey in Argentina.
The team competes in the Pan American Junior Championship which they have won a record 13 times. They have qualified for all Junior World Cups which they have won twice.
| Junior World Cup record | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Year | Host | Round | Squad | ||||||||
| 1979 |  Versailles, France | Group stage | 6th | 7 | 4 | 0 | 3 | 13 | 18 | ||
| 1982 | Kuala Lumpur, Malaysia | Withdrew | |||||||||
| 1985 |  Vancouver, Canada | Group stage | 7th | 8 | 3 | 2 | 3 | 23 | 16 | ||
| 1989 | Ipoh, Malaysia | Group stage | 5th | 7 | 4 | 1 | 2 | 16 | 15 | ||
| 1993 |  Terrassa, Spain | Group stage | 6th | 7 | 3 | 1 | 3 | 10 | 14 | ||
| 1997 | Milton Keynes, England | Group stage | 6th | 7 | 3 | 2 | 2 | 17 | 16 | ||
| 2001 |  Hobart, Australia | Final | 2nd | 8 | 5 | 1 | 2 | 20 | 14 | ||
| 2005 | Rotterdam, Netherlands | Final | 1st | 8 | 6 | 2 | 0 | 13 | 6 | ||
| 2009 | Johor Bahru, Malaysia Singapore | Group stage | 6th | 8 | 4 | 0 | 4 | 24 | 18 | ||
| 2013 |  New Delhi, India | Group stage | 11th | 5 | 2 | 0 | 3 | 11 | 13 | ||
| 2016 | Lucknow, India | Quarter-finals | 5th | 6 | 3 | 2 | 1 | 13 | 6 | Squad | |
| 2021 | Bhubaneswar, India | Final | 1st | 6 | 4 | 1 | 1 | 26 | 9 | Squad | |
| 2023 | Kuala Lumpur, Malaysia | 7th | 6 | 4 | 0 | 2 | 20 | 6 | 12 | Squad | |
| Total | 2 titles | 12/13 | 77 | 41 | 12 | 24 | 186 | 145 | |||
| Pan American Junior Championship[1] | |||
|---|---|---|---|
| Year | Host city | Position | |
| 1978 |  Mexico City, Mexico | 1st | |
| 1981 |  Santiago, Chile | 1st | |
| 1985 |  Orlando, United States | 1st | |
| 1988 |  Port of Spain, Trinidad and Tobago | 1st | |
| 1992 |  Havana, Cuba | 1st | |
| 1996 |  Bridgetown, Barbados | 1st | |
| 2000 | Santiago, Chile | 1st | |
| 2005 | Havana, Cuba | 1st | |
| 2008 | Port of Spain, Trinidad and Tobago | 1st | |
| 2012 | Guadalajara, Mexico | 1st | |
| 2016 | Toronto, Canada | 1st | |
| 2021 | Santiago, Chile | 2nd | |
| 2023 | Saint Michael, Barbados | 1st |
The following 18 players were named on 29 October 2021 for the 2021 Men's FIH Hockey Junior World Cup in Bhubaneswar, India.[2]
Caps updated as of 5 December 2021, after the match against Germany.
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The following players were listed on the roster for the 2022 events:[7] [8]
Head Coach: Juan Gilardi.
