This study aims to add to the body of knowledge and conceptual model regarding the role that network advantage plays as a mediating factor in the relationship between marketing capability and marketing performance. This study applied the survey method, one type of quantitative research, involving 170 responders from Small and Medium-sized Enterprises (SMEs) of Batik in Yogyakarta. The study utilized a purposive sampling approach to select the research sample. Data were gathered from respondents through the distribution of questionnaires and were then analyzed employing the Structural Equation Modeling (SEM) technique. The study’s findings demonstrate that marketing competence significantly and favourably influences SMEs’ long-term marketing performance. Network advantage is greatly and favourably influenced by marketing proficiency. The marketing performance of sustainable SMEs is positively and significantly impacted by network advantage. Network advantage might mitigate the impact of marketing capability on sustainable SMEs’ marketing performance. These findings have significant implications for SMEs, providing insights into how they can leverage their marketing capabilities and network advantage to improve their marketing performance.