In Kenya, most family planning services are utilized by female clients and this has led to this study to establish the factors hindering the utilization of family planning services among men of reproductive age in Langata Sub-County, Nairobi, Kenya. A descriptive cross-sectional research design was used. Convenience sampling technique was used to recruit the study participants. Data was collected using a questionnaire and with key informant interviews. Quantitative data was analyzed statistically while qualitative data was analyzed thematically. The results indicate that 100% of the participants had heard about Family Planning (FP) methods. Knowledge on FP methods for men was high for male condoms (88%), sterilization (24%), while withdrawal was identified by 4% of the participants. 28% of the men felt that family planning was a woman’s affair and only 4% (n-1) had visited a FP clinic. Additionally, 80% of the men reported current use of a FP method by their female partner. Barriers cited as hindering the utilization of family planning services by men include fear of vasectomy, lack of male friendly services, substance abuse and lack of time. The study concluded that men recognize that they have a role to play in family planning but admit that there are barriers to the utilization of family planning services. The study recommends the implementation of transformative family planning programmes that will actively engage men in the family planning agenda. Gender mainstreaming into family planning programmes will also be crucial to address the gender norms that make men shy away from utilizing family planning services.