In the current study, we aimed to investigate the mediating roles of paternal self-efficacy and relationship quality as serial mediators in associations with sexist attitudes and paternal involvement. For that purpose, a total of 420 married adult Turkish men with at least one child between the ages 4 and 10 participated, and the Ambivalent Sexism Inventory, Child-Oriented Sexist Attitude Scale, Parenting Sense of Competence Scale, Positive-Negative Relationship Quality Scale, Inventory of Father Involvement, and Personal Information Form were administered. Following the testing of six different serial mediation models, it came to light that a) paternal self-efficacy and relationship quality (both positive and negative aspects) were found to mediate the relationship between benevolent sexism and paternal involvement and b) paternal self-efficacy and relationship quality (both positive and negative aspects) were found to mediate the relationship between gender-biased attitudes towards the child and paternal involvement. The research findings are discussed in the context of relevant literature.