The men's discus throw event at the 2008 World Junior Championships in Athletics was held in Bydgoszcz, Poland, at Zawisza Stadium on 8 and 9 July 2008. A 1.75 kg (junior implement) discus was used.
| Gold | Gordon Wolf | |
| Silver | Marin Premeru | |
| Bronze | Mykyta Nesterenko |
9 July
| Rank | Name | Nationality | Attempts | Result | Notes | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | ||||||||
| align=left | align=left | 55.90 | 60.75 | 55.59 | 61.82 | 62.00 | x | 62.00 | |||||
| align=left | align=left | 57.25 | x | 56.70 | 60.19 | 61.85 | 58.72 | 61.85 | |||||
| align=left | align=left | | x | 61.01 | x | x | x | 59.54 | 61.01 | ||||
| 4 | align=left | align=left | x | 57.56 | 59.08 | x | 60.64 | 60.64 | 60.64 | ||||
| 5 | align=left | align=left |  | 58.77 | 58.96 | 58.99 | 59.89 | 59.44 | 59.67 | 59.89 | |||
| 6 | align=left | align=left |  | x | 55.95 | x | 53.48 | 58.63 | x | 58.63 | |||
| 7 | align=left | align=left |  | x | 53.41 | 55.43 | 56.75 | 56.48 | x | 56.75 | |||
| 8 | align=left | align=left |  | 56.41 | 54.52 | 53.46 | 55.62 | x | 54.95 | 56.41 | |||
| 9 | align=left | align=left |  | 48.31 | 54.65 | 49.40 | 54.65 | ||||||
| 10 | align=left | align=left |  | x | 54.14 | x | 54.14 | ||||||
| 11 | align=left | align=left |  | 52.69 | x | 52.50 | 52.69 | ||||||
| align=left | align=left |  | x | x | x | NM | |||||||
8 July
| Rank | Name | Nationality | Attempts | Result | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||||||
| 1 | align=left | align=left | | 57.71 | 52.78 | 58.53 | 58.53 | q | ||
| 2 | align=left | align=left | 58.18 | x | 58.16 | 58.18 | q | |||
| 3 | align=left | align=left | | 54.76 | 57.32 | x | 57.32 | q | ||
| 4 | align=left | align=left | | 51.43 | 50.58 | 55.80 | 55.80 | q | ||
| 5 | align=left | align=left | | x | 55.33 | 54.28 | 55.33 | q | ||
| 6 | align=left | align=left | | x | 53.62 | 52.52 | 53.62 | q | ||
| 7 | align=left | align=left |  | 53.06 | 46.58 | 50.22 | 53.06 | |||
| 8 | align=left | align=left | 51.49 | 52.64 | 44.96 | 52.64 | ||||
| 9 | align=left | align=left |  | 48.21 | 52.29 | 50.70 | 52.29 | |||
| 10 | align=left | align=left |  | 51.85 | 51.95 | 52.18 | 52.18 | |||
| 11 | align=left | align=left |  | 49.91 | 35.61 | 51.00 | 51.00 | |||
| 12 | align=left | align=left | 48.71 | 50.36 | 45.72 | 50.36 | ||||
| 13 | align=left | align=left | 50.24 | x | x | 50.24 | ||||
| 14 | align=left | align=left | | 49.43 | x | - | 49.43 | |||
| 15 | align=left | align=left |  | x | 49.22 | x | 49.22 | |||
| 16 | align=left | align=left |  | x | 48.91 | 46.15 | 48.91 | |||
| Rank | Name | Nationality | Attempts | Result | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||||||
| 1 | align=left | align=left | | 61.77 | - | - | 61.77 | Q | ||
| 2 | align=left | align=left | 59.29 | - | - | 59.29 | Q | |||
| 3 | align=left | align=left | 56.18 | 58.60 | 57.04 | 58.60 | q | |||
| 4 | align=left | align=left | | 55.80 | x | 56.19 | 56.19 | q | ||
| 5 | align=left | align=left | | x | 53.97 | 55.17 | 55.17 | q | ||
| 6 | align=left | align=left | | 51.26 | 51.92 | 54.74 | 54.74 | q | ||
| 7 | align=left | align=left |  | 50.91 | 50.21 | 53.04 | 53.04 | |||
| 8 | align=left | align=left | | 51.67 | 52.88 | 51.20 | 52.88 | |||
| 9 | align=left | align=left |  | 48.79 | 48.34 | 51.88 | 51.88 | |||
| 10 | align=left | align=left | 51.67 | 43.71 | 50.10 | 51.67 | ||||
| 11 | align=left | align=left | | x | 49.77 | 51.49 | 51.49 | |||
| 12 | align=left | align=left | | 49.48 | 51.22 | 51.05 | 51.22 | |||
| 13 | align=left | align=left | | x | x | 48.75 | 48.75 | |||
| 14 | align=left | align=left | | x | 46.98 | x | 46.98 | |||
| align=left | align=left | x | x | x | NM | |||||
According to an unofficial count, 31 athletes from 23 countries participated in the event.