Infidelity causes damages that may result to tragedies such as breaking of families, divorce, physical violence, and emotional distress to the non-participating partner. This emotional distress may lead to destruction of the non-participating partner’s self-esteem, self-worth, and feel overwhelming emotions like guilt and rejection. Hence, this traumatic experience of infidelity may also end up positively for the non-participating partner. The emotional distress may become a source of positive psychological changes or posttraumatic growth (PTG). Thus, this PTG of non-participating partners may change their perspective toward their negative experience from infidelity. With this, the study aims to describe the posttraumatic growth of the male non-participating partners through their lived experiences in the aftermath of the traumatic incident, infidelity. This paper also included the factors that contributed to the growth of the male non-participating partners who experienced infidelity. Using purposive sampling, the data were collected through one-on-one interviews with the eight participants using semi-structured interview questions. The data gathered were analyzed using thematic analysis which is usually used in qualitative researches for identifying, analyzing, and reporting of the themes or patterns of the data.