The men's triple jump event at the 1986 World Junior Championships in Athletics was held in Athens, Greece, at Olympic Stadium on 19 and 20 July.
| Gold | Igor Parygin | |
| Silver | Zdravko Dimitrov | |
| Bronze | Du Benzhong |
20 July
| Rank | Name | Nationality | Result | Notes | ||||
|---|---|---|---|---|---|---|---|---|
| align=left | align=left | 16.97 | ||||||
| align=left | align=left | 16.13 | ||||||
| align=left | align=left | | 16.00 | |||||
| 4 | align=left | align=left | 15.82 | |||||
| 5 | align=left | align=left | 15.66 | |||||
| 6 | align=left | align=left |  | 15.60 w | ||||
| 7 | align=left | align=left |  | 15.39 | ||||
| 8 | align=left | align=left | 15.28 | |||||
| 9 | align=left | align=left | 15.24 | |||||
| 10 | align=left | align=left | 15.20 | |||||
| 11 | align=left | align=left |  | 13.30 | ||||
| align=left | align=left |  | bgcolor=pink | DQ | (IAAF rule 32.2) |
19 Jul
| Rank | Name | Nationality | Result | Notes | |||
|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | 16.10 | Q | |||
| 2 | align=left | align=left | | 15.89 | Q | ||
| 3 | align=left | align=left | 15.78 | Q | |||
| 4 | align=left | align=left | | 15.70 | Q | ||
| 5 | align=left | align=left | | 15.47 | q | ||
| 6 | align=left | align=left | | 15.44 | |||
| 7 | align=left | align=left |  | 15.43 | |||
| 8 | align=left | align=left | 15.15 | ||||
| 9 | align=left | align=left |  | 15.11 | |||
| 10 | align=left | align=left | 14.43 | ||||
| 11 | align=left | align=left |  | 13.93 | |||
| 12 | align=left | align=left | 13.68 | ||||
| 13 | align=left | align=left | 13.53 | ||||
| align=left | align=left |  | NM | ||||
| align=left | align=left | NM | |||||
| align=left | align=left | NM |
| Rank | Name | Nationality | Result | Notes | ||||
|---|---|---|---|---|---|---|---|---|
| 1 | align=left | align=left | 15.82 | Q | ||||
| 2 | align=left | align=left | 15.80 | Q | ||||
| align=left | align=left | 15.80 | Q | |||||
| 4 | align=left | align=left | | 15.67 | Q | |||
| 5 | align=left | align=left | 15.60 | Q | ||||
| 6 | align=left | align=left | 15.52 | Q | ||||
| 7 | align=left | align=left | 15.45 | |||||
| 8 | align=left | align=left |  | 15.21 | ||||
| 9 | align=left | align=left | | 15.19 | ||||
| 10 | align=left | align=left |  | 14.97 | ||||
| 11 | align=left | align=left |  | 14.93 | ||||
| 12 | align=left | align=left | 14.76 | |||||
| 13 | align=left | align=left |  | 14.68 | ||||
| 14 | align=left | align=left | | 14.59 | ||||
| 15 | align=left | align=left | 13.55 | |||||
| align=left | align=left |  | NM | |||||
| align=left | align=left | | bgcolor=pink | DQ | (IAAF rule 32.2) Q |
According to an unofficial count, 33 athletes from 28 countries participated in the event.