This study was on the Impact of Tertiary Education TrustFund on the training of teaching staff of public tertiary institutions in the Federal Capital Territory, Abuja, Nigeria. The study adopted the cross-sectional descriptive survey research design. The total population of the study was 865 teaching staff drawn from public tertiary institutions in the Federal Capital Territory. Primary data were collected using structured questionnaire that were administered on a sample of 274 teaching staff which were used for the analyses. One research question was answered, while one hypothesis was formulated and tested with the use of SPSS version 25, where Product Moment Correlation Coefficient formula and simple regression analysis used for the analysis at 0.05 significant level were employed. The results of the study indicated that TETFund intervention had a positive and significant impact on the training of teaching staff of tertiary institutions in the Federal Capital Territory. Based on the findings, the study recommended among others that TETFund should increase its yearly allocations of funds to tertiary institutions in the FCT, Abuja and the 2 percent assessable profit from registered companies operating in Nigeria should be increased to about 4 percent.