This study was set out to demonstrate the magnitude of male partner involvement and measure the strength of association with the determinants. Male partner involvement into PMTCT services in Mwanza urban is low. Proactive mothers on asking escort from their partners is the mostly associated promoting factor of male involvement followed by partners' knowledge on PMTCT then hearing TV/Radio announcements addressing PMTCT. Unwillingness of a mother to be escorted by partner is the major hindrance of male involvement into PMTCT services. Male partner involvement is likely to reduce events of gender based violence. TV/Radio announcements addressing PMTCT need to be advocated so as to increase exposure to every man. Likewise women have a role to play in making their men participate in PMTCT activities.