The men's discus throw event at the 1988 World Junior Championships in Athletics was held in Sudbury, Ontario, Canada, at Laurentian University Stadium on 27 and 28 July. A 2 kg (senior implement) discus was used.
| Gold | Andreas Seelig | |
| Silver | Kamy Keshmiri | |
| Bronze | Yuriy Nesteryets |
28 July
| Rank | Name | Nationality | Attempts | Result | Notes | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | ||||||||
| align=left | align=left | 54.06 | 56.96 | 56.90 | 57.90 | 58.60 | 56.20 | 58.60 | |||||
| align=left | align=left | | 48.38 | 48.60 | 53.18 | 50.86 | 54.68 | 54.36 | 54.68 | ||||
| align=left | Yuriy Nesteryets | 51.26 | x | x | 51.96 | 53.70 | 52.72 | 53.70 | |||||
| 4 | align=left | align=left | 53.00 | x | x | x | x | 52.08 | 53.00 | ||||
| 5 | align=left | Tapani Alentola |  | 45.78 | 46.68 | 49.70 | 48.90 | 51.40 | x | 51.44 | |||
| 6 | align=left | Pedro Acosta |  | x | 49.66 | 49.24 | 49.62 | 49.98 | 50.98 | 50.98 | |||
| 7 | align=left | Jaroslav Žitnanský | 49.66 | 48.30 | 49.26 | x | x | 50.16 | 50.16 | ||||
| 8 | align=left | Ma Wei |  | x | 50.16 | x | x | x | x | 50.16 | |||
| 9 | align=left | align=left | 44.74 | x | 49.30 | 49.30 | |||||||
| 10 | align=left | Dariusz Kosinski |  | 48.74 | x | x | 48.74 | ||||||
| 11 | align=left | Joachim Tidow | 47.92 | x | 46.22 | 47.92 | |||||||
| 12 | align=left | align=left | 44.26 | x | 45.46 | 45.46 | |||||||
27 Jul
| Rank | Name | Nationality | Attempts | Result | Notes | ||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | |||||||
| 1 | align=left | align=left | 55.94 | - | - | 55.94 | Q | ||
| 2 | align=left | align=left | 49.32 | 52.88 | - | 52.88 | Q | ||
| 3 | align=left | Yuriy Nesteryets | 50.82 | 52.80 | - | 52.80 | Q | ||
| 4 | align=left | align=left | 52.68 | - | - | 52.68 | Q | ||
| 5 | align=left | Pedro Acosta | | x | 52.44 | - | 52.44 | Q | |
| 6 | align=left | align=left | | 48.50 | 45.78 | 51.28 | 51.28 | Q | |
| 7 | align=left | Tapani Alentola | | 50.60 | x | 47.38 | 50.60 | q | |
| 8 | align=left | Jaroslav Žitnanský | 47.68 | 50.18 | x | 50.18 | q | ||
| 9 | align=left | Dariusz Kosinski | | 49.88 | x | x | 49.88 | q | |
| 10 | align=left | Joachim Tidow | 49.56 | 47.98 | x | 49.56 | q | ||
| 11 | align=left | align=left | 49.30 | 48.88 | 47.92 | 49.30 | q | ||
| 12 | align=left | Ma Wei | | 47.36 | 48.78 | 48.84 | 48.84 | q | |
| 13 | align=left | Jean Pons |  | 45.02 | 48.48 | 48.38 | 48.48 | ||
| 14 | align=left | John Nichols | | 44.90 | 48.14 | x | 48.14 | ||
| 15 | align=left | align=left |  | 44.84 | 46.58 | 48.12 | 48.12 | ||
| 16 | align=left | Janne Sandvik | | 46.88 | x | 47.80 | 47.80 | ||
| 17 | align=left | Hussein Ali Al-Sayed | 32.96 | x | 32.82 | 32.96 | |||
| align=left | Lee Andrews |  | x | x | x | NM | |||
According to an unofficial count, 18 athletes from 14 countries participated in the event.