Mental imagery about suicide is a commonly experienced risk factor for suicide but includes a range of imagery that have yet to be explored in relation to suicide behaviour. This study primarily aims to identify common themes in content, perceived function, and subjective meaning in relation to suicide behaviour. Secondarily, the study aims to describe the broader characteristics of suicide imagery in relation to behaviour. Twenty participants completed in-depth interviews regarding specific suicide imagery experiences; ten participants separately described an instance of suicide imagery that preceded behaviour as well as an instance of imagery that was not acted upon, while another ten participants only described an instance of imagery that was not associated with an attempt. For each instance of sucide imagery, participants quantitatively rated characteristics such as vividness and emotional impact. Participants also provided qualitative information about the content, perceived function, and subjective meaning of their imagery across the 30 unique instances of suicide imagery. Qualitative data underwent Framework Analysis which resulted in five key themes: (a) Determination imagery depicting a single suicide method, (b) Solution imagery highlighting wanted impacts of suicide for self and others, (c) imagery depicting suicide as a Mental Exercise or fantasy, (d) Discouraging imagery of unwanted impacts of suicide for self and others, and (e) Consideration imagery weighing up different methods of suicide without commitment to enacting one of these methods. Findings suggest that imagery themes may vary on dimensions reflecting facilitation and deterrence of suicide, which may interact to produce ambivalence. This study provides a more nuanced understanding of suicide imagery subtypes in relation to suicide behaviour and provides a framework to assist clinicians in the assessment and formulation of suicide imagery.