This study explores men’s perceived bargaining power of their spouses and its role on decision-making in the adoption of improved cassava varieties (ICV) in Nigeria. The primary data were collected in 2015 from 2,118 households in the four primary cassava producing regions of Nigeria, and were analyzed to develop variables measuring the bargaining power men in the household perceived their spouses to have in terms of economic and social asset control and/or access. Utilizing a double-hurdle model to measure the probability and intensity of adopting ICVs, the study shows that the more bargaining power the spouse is perceived to have the lower the probability and less intensely a household adopts ICVs. Evidence shows when women are members of cooperatives the likelihood of adopting ICVs decreases, and when women are perceived to have more bargaining power in terms of control of household assets and land the intensity of adopting ICVs decreases.