This study explored factors that influence male involvement in reproductive health in western Kenya. Qualitative study design was used. From December 2008 to February 2009, data were collected via in-depth interviews and focus group discussions (FGDs) at three provinces of western Kenya. Twelve in-depth interviews and eight FGDs were conducted. Five participants in in-depth interviews were female, seven were male. Four of the FGDs had all-male participants, four all-female. The factors that influence male involvement in reproductive health emerged in two themes, namely gender norms and the traditional approaches used to implement reproductive health and family planning programs. Any strategy taken to involve men in reproductive health must therefore consider addressing these two factors. A review of the traditional approaches of implementing reproductive health is necessary to make them more male-friendly.