The Belgium men's national under-21 field hockey team represents Belgium in men's international under-21 field hockey and is controlled by the Royal Belgian Hockey Association, the governing body for field hockey in Belgium. The team plays in the Men's EuroHockey Junior Championships and has qualified eight times for the Men's FIH Hockey Junior World Cup. Their biggest successes were winning the EuroHockey Junior Championship in 2012 and being runners-up at the 2016 Junior World Cup.