The men's hammer throw event at the 1988 World Junior Championships in Athletics was held in Sudbury, Ontario, Canada, at Laurentian University Stadium on 29 and 30 July. A 7257g (senior implement) hammer was used.
| Gold | Vadim Kolesnik | |
| Silver | Oleg Polyushik | |
| Bronze | Thomas Hommel |
30 July
| Rank | Name | Nationality | Attempts | Result | Notes | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | ||||||||
| align=left | align=left | 69.52 | 68.54 | 68.80 | 67.24 | 66.26 | 67.44 | 69.52 | |||||
| align=left | align=left | 69.00 | x | x | x | x | x | 69.00 | |||||
| align=left | align=left | 65.44 | 62.98 | 62.88 | 64.34 | 64.04 | 66.06 | 66.06 | |||||
| 4 | align=left | align=left | 64.48 | 64.02 | 64.58 | 64.04 | 65.48 | x | 65.48 | ||||
| 5 | align=left | align=left |  | 62.88 | 63.70 | 62.74 | 65.08 | 64.78 | 61.86 | 65.08 | |||
| 6 | align=left | align=left | | 64.78 | 64.34 | x | x | 63.56 | x | 64.78 | |||
| 7 | align=left | align=left | 59.46 | 61.84 | 62.40 | 60.06 | x | 62.58 | 62.58 | ||||
| 8 | align=left | align=left |  | x | 62.14 | x | 61.94 | x | 62.04 | 62.14 | |||
| 9 | align=left | align=left |  | x | x | 61.86 | 61.86 | ||||||
| 10 | align=left | align=left |  | 59.46 | 61.00 | 59.54 | 61.00 | ||||||
| 11 | align=left | align=left |  | x | 58.58 | 60.20 | 60.20 | ||||||
| align=left | align=left |  | x | x | x | NM | |||||||
29 Jul
| Rank | Name | Nationality | Attempts | Result | Notes | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | ||||||||
| 1 | align=left | align=left | 67.62 | - | - | 67.62 | Q | |||
| 2 | align=left | align=left | 65.50 | - | - | 65.50 | Q | |||
| 3 | align=left | align=left | | 64.76 | - | - | 64.76 | Q | ||
| 4 | align=left | align=left | | 64.08 | - | - | 64.08 | Q | ||
| 5 | align=left | align=left | 63.76 | - | - | 63.76 | Q | |||
| 6 | align=left | align=left | | x | 63.26 | - | 63.26 | Q | ||
| 7 | align=left | align=left | | 62.96 | - | - | 62.96 | Q | ||
| 7 | align=left | align=left | | 62.96 | - | - | 62.96 | Q | ||
| 9 | align=left | align=left | 62.28 | - | - | 62.28 | Q | |||
| 10 | align=left | align=left | 59.92 | 60.60 | 62.12 | 62.12 | Q | |||
| 11 | align=left | align=left | | 62.04 | - | - | 62.04 | Q | ||
| 12 | align=left | align=left | | 57.94 | 61.46 | - | 61.46 | Q | ||
| 13 | align=left | align=left |  | x | x | 60.66 | 60.66 | |||
| 14 | align=left | align=left | | 58.02 | 58.18 | 59.44 | 59.44 | |||
| 15 | align=left | align=left |  | 55.24 | 54.68 | 54.92 | 55.24 | |||
| align=left | align=left |  | x | x | x | NM | ||||
According to an unofficial count, 16 athletes from 13 countries participated in the event.