The present study examined the associations among biased attentional responding to thinideal bodies, appearance comparisons, eating disorder-specific rumination, and body dissatisfaction. Sixty-seven females completed an attentional task capable of independently assessing biased attentional engagement with, and biased attentional disengagement from, images of thin-ideal bodies relative to images of non-thin bodies. Self-report measures of the other relevant constructs were also taken. Results revealed that a heightened tendency to engage in appearance comparisons was predicted by increased attentional engagement with thin-ideal bodies but not by impaired attentional disengagement from thin-ideal bodies. Moreover, a serial mediation analysis revealed that increased attentional engagement with thin-ideal bodies was associated with greater appearance comparison, which in turn was associated with greater eating disorder-specific rumination and consequently greater body dissatisfaction. The current findings suggest that increased attentional engagement with thin-ideal bodies might represent a pathway to body dissatisfaction, mediated by greater appearance comparison and eating-disorder specific rumination. The majority of Australian women (86.9%) report some level of dissatisfaction with their weight and shape (Mond et al., 2013). This is particularly concerning given that body dissatisfaction is a core contributor to the emergence of eating disorders (Stice, Gau, Rohde, & Shaw, 2017; Stice, Marti, & Durant, 2011; Stice & Shaw, 2002). Internalisation of contemporary society's idealisation of thinness has been identified as a potent vulnerability factor for body dissatisfaction (Cafri, Yamamiya, Brannick, & Thompson, 2006; Thompson & Stice, 2001). As a consequence, researchers have been increasingly motivated to understand the cognitive factors that contribute to such dissatisfaction. One influential hypothesis is that cognitive biases, that operate to increase selectively processing of appearance-related stimuli representing the thin-ideal, may play a role in the onset and/or maintenance of body dissatisfaction (Jiang & Vartanian, 2016; Rodgers & DuBois, 2016). Previous research has shown an association between an attentional bias to thin-ideal stimuli and body dissatisfaction in community samples of women (