The men's discus throw event at the 2000 World Junior Championships in Athletics was held in Santiago, Chile, at Estadio Nacional Julio Martínez Prádanos on 20 and 21 October. A 2 kg (senior implement) discus was used.
| Gold | Hannes Hopley | |
| Silver | Niklas Arrhenius | |
| Bronze | Rutger Smith |
21 October
| Rank | Name | Nationality | Attempts | Result | Notes | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | ||||||||
| align=left | align=left | 58.01 | 56.82 | x | 52.93 | 59.51 | 56.52 | 59.51 | |||||
| align=left | align=left | | 53.48 | 53.63 | 51.57 | 56.32 | 59.19 | x | 59.19 | ||||
| align=left | align=left | 56.39 | 58.70 | x | x | x | x | 58.70 | |||||
| 4 | align=left | align=left |  | 54.86 | 56.58 | 55.73 | x | 58.62 | 57.86 | 58.62 | |||
| 5 | align=left | align=left |  | 56.28 | 58.29 | 56.71 | x | x | 55.82 | 58.29 | |||
| 6 | align=left | align=left |  | 54.93 | 56.94 | 55.37 | 55.51 | x | x | 56.94 | |||
| 7 | align=left | align=left |  | 56.24 | x | 54.20 | 54.95 | x | x | 56.24 | |||
| 8 | align=left | align=left |  | 51.65 | x | 51.55 | x | x | 52.01 | 52.01 | |||
| 9 | align=left | align=left |  | 51.09 | x | 51.61 | 51.61 | ||||||
| 10 | align=left | align=left |  | 51.01 | 51.61 | x | 51.61 | ||||||
| 11 | align=left | align=left |  | 50.56 | x | 49.86 | 50.56 | ||||||
| 12 | align=left | align=left |  | x | x | 50.47 | 50.47 | ||||||
20 October
| Rank | Name | Nationality | Attempts | Result | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||||||
| 1 | align=left | align=left | 57.12 | - | - | 57.12 | Q | |||
| 2 | align=left | align=left | | x | 53.84 | 54.84 | 54.84 | q | ||
| 3 | align=left | align=left | | 50.70 | 53.63 | 45.27 | 53.63 | q | ||
| 4 | align=left | align=left | | 49.46 | 51.09 | 52.85 | 52.85 | q | ||
| 5 | align=left | align=left | | x | 52.69 | x | 52.69 | q | ||
| 6 | align=left | align=left | | 50.41 | 52.06 | 51.70 | 52.06 | q | ||
| 7 | align=left | align=left | | x | 50.91 | 47.22 | 50.91 | q | ||
| 8 | align=left | align=left |  | 50.48 | x | 50.19 | 50.48 | |||
| 9 | align=left | align=left |  | 49.53 | 48.75 | x | 49.53 | |||
| 10 | align=left | align=left |  | x | 48.10 | 44.36 | 48.10 | |||
| 11 | align=left | align=left | 47.48 | 46.09 | 46.90 | 47.48 | ||||
| 12 | align=left | align=left | x | 46.32 | x | 46.32 | ||||
| 13 | align=left | align=left |  | 41.20 | 45.58 | x | 45.58 | |||
| 14 | align=left | align=left | | 45.51 | x | 43.25 | 45.51 | |||
| Rank | Name | Nationality | Attempts | Result | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||||||
| 1 | align=left | align=left | 56.14 | - | - | 56.14 | Q | |||
| 2 | align=left | align=left | | x | 54.40 | 54.37 | 54.40 | q | ||
| 3 | align=left | align=left | | x | 51.61 | 54.38 | 54.38 | q | ||
| 4 | align=left | align=left | | x | 51.24 | x | 51.24 | q | ||
| 5 | align=left | align=left | | 49.44 | 50.84 | x | 50.84 | q | ||
| 6 | align=left | align=left | 50.80 | 50.52 | x | 50.80 | ||||
| 7 | align=left | align=left | 50.63 | 50.54 | 47.43 | 50.63 | ||||
| 8 | align=left | align=left |  | x | 44.59 | 50.56 | 50.56 | |||
| 9 | align=left | align=left |  | 50.43 | 48.24 | 47.11 | 50.43 | |||
| 10 | align=left | align=left | x | 48.94 | 47.02 | 48.94 | ||||
| 11 | align=left | align=left | 46.79 | 48.31 | x | 48.31 | ||||
| 12 | align=left | align=left | | x | 48.09 | 45.98 | 48.09 | |||
| 13 | align=left | align=left | 47.55 | 47.45 | 48.07 | 48.07 | ||||
| 14 | align=left | align=left | | 45.52 | 47.77 | x | 47.77 | |||
| 15 | align=left | align=left | x | 45.34 | x | 45.34 | ||||
| 16 | align=left | align=left |  | x | 43.53 | 45.03 | 45.03 | |||
According to an unofficial count, 30 athletes from 26 countries participated in the event.