The aim of this study was to investigate if gambling advertising could negatively affect Swedish players to gamble more often and bet more money than they would otherwise. The researchers analyzed data that were collected in 2014 for the Swedish Longitudinal Gambling Study (Swelogs). Participants were 2163 gamblers aged 22 and older. They found that most participants believed advertising had no effect on their gambling behaviour. Those who reported that they were negatively affected by advertising were more likely to have gambling problems. In addition, those who gambled online, gambled monthly or more often, and were in the age group of 30-49 years were more likely to report negative influence from gambling advertising. The results of this study show that few gamblers are negatively affected by gambling advertising. But its effect on some gamblers, especially problem gamblers, should not be neglected.