Gynecomastia is a common problem in the medical field. In contrast to worldwide data, the prevalence of gynecomastia in Indonesia is still unknown. The objective of this study was to describe the characteristics of male patients with gynecomastia in the andrology unit of Dr. Soetomo Hospital, Surabaya, Indonesia. A descriptive cross-sectional design was implemented in this study. There were 20 male patients at the department of Andrology RSUD Dr. Soetomo Surabaya within 2015-2019. The highest prevalence of gynecomastia patients in the age group was aged 30-39 years old (22.9%). In Surabaya, Indonesia, the incidence of gynecomastia is a pretty rare condition. Careful history taking and physical examination skills are needed to diagnose gynecomastia.