Both suicidal ideation and problem gambling are major global health issues. Suicidal ideation and problem gambling may be linked to one another through interpersonal security. Interpersonal security is how secure someone feels in their relationships with others. People who feel more secure in their relationships are less likely to have suicidal thoughts or behaviours. This study tested for the links between interpersonal security, suicidal ideation, and problem gambling. The researchers surveyed 343 adults from two regions in Italy. Participants with higher interpersonal security were less likely to have suicidal ideation. They were also less likely to experience problem gambling. Thus, high interpersonal security might protect people from both suicidal ideation and problem gambling. However, problem gambling itself was not directly linked to suicidal ideation.