The study examined the human capacity building (HCB) of micro and small technical enterprises (MSTEs) in Southwestern Nigeria (SN). The study used questionnaire for data collection. The questionnaire were administered on three hundred respondents in SN; Lagos, Oyo, Ondo and Ekiti states. Two hundred and forty-nine (83%) were retrieved and used for the analysis of the study. The study was analysed with both descriptive and inferential statistics. The study shows that larger proportion of the operators of MSTEs had pre-higher education (49.4%), with 3-5 technical workshops training (46.3%), less than 6 years of apprenticeship (98.4%), and had spent 3 years and above in technical education (91.9%). The study shows that HCB influences both sales volume (r = 0.248**, p<1% and r = 0.329**, p<1%) and profit level (r = 0.250**, p<1% and r = 0.299**, p<1%) of the operators. The study shows that the 31% of relationship between HCB and performance of MSTEs in the study area was significant (F2, 71 = 3.712, p<5%) and concluded that improved human capital of the operators will enhance the performance of MSTEs in the study area. The study recommends that capacity building should be paramount to the technical operators and policy makers in the study area.