Intimate partner violence (IPV) against women is an important concern with one in four to one in six Australian women experiencing emotional or physical IPV. Several factors have been established by the World Health Organization (WHO, 2021) as predictors of IPV and to help assess an individual’s risk, including risk factors that pertain to the perpetrator. This study explores the role of custody dissatisfaction as a potential risk factor for IPV against women and examines whether custody dissatisfaction mediates the relationship between adherence to stereotypical masculine norms (SMN) and IPV. Data were obtained from the Ten to Men study, a collection of data on Australian men’s health, which includes measures of SMN, custody dissatisfaction, and IPV perpetration. Data from 1289 male participants (19–55 years of age) with dependent children from former relationships showed that custody dissatisfaction predicts emotional and physical IPV perpetration but does not mediate the SMN/IPV relationship. Our findings confirm in a representative Australian sample that conformity to SMN is a predictor of IPV, and that custody dissatisfaction may also be considered a risk factor for IPV perpetration. However, custody dissatisfaction did not mediate the relationship between SMN and IPV.