| Tournament: | 2005 Men's Hockey Junior World Cup |
| Other Titles: | Rabo Junior World Cup 2005 Rotterdam Men |
| Country: | Netherlands |
| City: | Rotterdam |
| Dates: | 29 June – 10 July |
| Venues: | Hazelaarweg Stadion |
| Teams: | 16 |
| Confederations: | 5 |
| Count: | 1 |
| Matches: | 62 |
| Goals: | 317 |
| Top Scorer: | Colin Hennessy |
| Top Scorer Goals: | 15 |
| Best Player: | Lucas Vila |
| Previous Year: | 2001 |
| Previous Tournament: | 2001 Men's Hockey Junior World Cup |
| Next Year: | 2009 |
| Next Tournament: | 2009 Men's Hockey Junior World Cup |
The 2005 Men's Hockey Junior World Cup was the eighth edition of the Men's Hockey Junior World Cup, the quadrennial world championship for men's national under-21 national field hockey teams organized by the International Hockey Federation. It was held from 29 June to 10 July 2005 in Rotterdam, Netherlands.
Argentina won their first title by defeating Australia 2–1 in the final. Spain won the bronze medal by defeating the defending champions India 6–5 after penalty strokes after the match finished 1–1 after extra time.
All times are local, CEST (UTC+2).
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Points obtained against qualified teams from the same group were carried over.
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