Negative body image is a frequent problem with potentially serious consequences, like the development of eating disorders such as Anorexia Nervosa. Unfortunately, current treatments show very limited effectiveness in modifying body image concerns. Clearly, there is an urgent need for more effective body image interventions. This project therefore explores a new, theory-informed approach to tackle body image concerns. The proposed study reflects a collaborative effort with a supra-regional eating disorder treatment center and is designed to test the efficacy of a novel unconscious evaluative conditioning procedure in which we use Continuous Flash Suppression to present own-body pictures outside awareness, and pair participants’ pictures with signs of positive social feedback to strengthen body-positive associations. Unconscious evaluative conditioning has the promise to outperform existing interventions because it prevents the disadvantageous (re)activation of negative body-associations that is evident during common body exposure and prevents discarding positive feedback as irrelevant for the body image. If this promise indeed comes to pass, the project would provide a very welcome contribution to the currently available interventions and would provide an important tool to alleviate the suffering of people with mental disorders in which negative body image is a core symptom such as Anorexia Nervosa.