Trust　is　a　risky　social　decision　because　betrayal　may　occur.　It＇s　not　clear　how　individual　differences　in　social　risk-seeking　propensity　modulate　brain　processes　of　trusting　strangers.　We　examined　event-related　potentials　and　time-frequency　power　to　investigate　this　question　while　40　participants　played　the　one-shot　trust　game.　Twenty　high　social　risk-seekers　(HSR)　and　20　low　social　risk-seekers　(LSR)　made　trusting　or　distrusting　decisions　regarding　unknown　trustees　while　their　electroencephalogram　activity　was　recorded.　At　the　decision-making　stage,　HSR　participants　exhibited　a　larger　N2　and　increased　β　power　following　distrusting　decisions　than　trusting　decisions,　suggesting　greater　cognitive　control　exerted　to　distrust.　By　contrast,　no　such　N2　and　β　differences　were　found　for　LSR　participants.　At　the　outcome　evaluation　stage,　LSR　participants　exhibited　a　more　negative-going　difference　wave　between　loss　feedback-related　negativity　(FRN)　and　gain　FRN　(dFRN)　and　increased　θ　power　(following　losses　compared　to　gains)　than　did　HSR　participants,　indicating　enhanced　risk　sensitivity　of　LSR　people.　Our　findings　provide　insights　into　the　mechanism　by　which　social　risk-taking　facilitates　trusting　strangers.　The　results　also　shed　light　on　the　temporal　course　of　brain　activity　involved　in　trust　decision-making　and　outcome　evaluation,　as　well　as　how　individual　differences　modulate　brain　dynamics　of　trusting　strangers.　©　2017　American　Psychological　Association.