Young male adults are at greater risk for gambling-related problems. Social support can help protect them from developing gambling-related problems. This study examined the relationship between gambling behaviour, gambling-related problems, and perceived emotional and social support (PESS) among young adult men over two years. The sample consisted of 169 young adult men between 18 and 25 years. Participants with low levels of PESS were less likely than those with high PESS to have a partner. They also had higher scores on depression and anxiety. Additionally, they gambled less frequently but gambled more hours per day when they did gamble. Across the 169 participants, those with higher levels of PESS had improved gambling disorder scores over time (i.e., fewer gambling problems). The results of the within-participant analysis found that over time, participants with higher PESS had fewer gambling-related problems, gambled less frequently, and gambled fewer hours than they did at baseline.