Purpose We investigated sexual function and factors affecting sexual satisfaction in Korean men with SCI. Methods This study included thirty-five men with SCI according to the American Spinal Injury Association (ASIA) scale A-D criteria. The participants were aged 18 to 65, with an onset of at least 2 years, had completed rehabilitation, and lived in the local community. The participants were classified into sexually active and non-active groups. Results There were no statistically significant differences in terms of neurological level, ASIA classification, SCIM-Ⅲ classification, urinary incontinence, chronic pain, spasticity, or sensation in the genital area between the two groups. The factors related to sexual activity were the duration after SCI and whether the individual maintained a stable relationship with their partner. Conclusion The variables related to sexual activity in men with SCI were the absence of a partner and the duration of injury. Providing support for sexual information and social relationship formation during rehabilitation, addressing sexual adaptation to physical changes related to one’s sexuality due to SCI, and conducting research on methods for developing new sexual experiences due to SCI could improve their self-esteem and quality of life.