Internet banking expected to ease commercial transactions and uplift satisfactory services. Studies affirmed internet banking in Nigeria is low compared with other e-banking systems. This study analyzed mediation role of trust in technology, theory of planned behavior and trust model adoption. Statistical package for the social science (SPSS) and VBSEM-AMOS adopted for descriptive statistics and modeling principal mediation effect of trust based on 391 respondents. Finding indicated that TPB factors; subjective norm, perceived behavioral control, attitude and trust regressed on intent to accept internet banking and achieved a 72% variance explained, integrity, benevolence, competency and predictability regressed on trust to internet banking acceptance and a 71% variance explained. However, partial mediation trust effect achieved a 73% variance explained of TPB with exclusion of attitude in the model. This study justified the mediation role of trust in internet banking acceptance in Nigeria thus, recommended further replication in differ dimensions.