Objective: to identify factors associated with the presence of suicidal ideation in caregivers of stroke survivors. Methods: cross-sectional survey conducted with 151 primary informal caregivers. The Depression Anxiety and Stress Scale-21 and a questionnaire were used to evaluate the presence of thoughts of suicidal ideation, whose data were analyzed by descriptive and inferential statistics. Results: most caregivers had normal levels of depression (76.8%), anxiety (76.2%) and stress (79.5%), and showed no thoughts of suicidal ideation (70.9%). The correlation between scales showed that thoughts of suicidal ideation rise proportionally to the increase of anxiety, depression and stress levels. Conclusion: it was observed that high levels of depression, anxiety and stress favored the increased frequency of suicidal thoughts among caregivers of stroke survivors.