This research aims to analyze the partial effect of Perceived Usefulness on Attitude toward Using, Perceived Ease of Use on Attitude toward Using, Perceived Trust on Attitude toward Using and the simultaneous influence of Perceived Usefulness, Perceived Ease of Use, and Perceived Trust on Attitude Toward Using. The population of this research is regular customers of Ikens Group wholesalers who have downloaded and installed Ikens wholesale mobile apps which spread throughout Indonesia and currently have 320 subscribers. The number of samples is determined by using Slovin formula at 5% error rate which is 178. The quantitative analysis method is by using equation analysis of multiple linear regressions followed by simultaneous test (F-test), partial hypothesis testing (t-test), and determination analysis (R Square) with a 5-percent alpha (0.05). Before the regression test, data quality and classical assumption tests were performed first. The tool for analysis is by using IBM SPSS Statistics software version 23 for Mac. The result of this research shows that the Perceived Usefulness has a strong effect on the partial Attitude Toward Using, the Perceived Ease of Use has an moderate effect on the partial Attitude Toward Using, the Perceived Trust has a strong effect on the Attitude Toward Using, as well as the simultaneous Perceived Usefulness, Perceived Ease of Use, and Perceived Trust influence the Attitude Toward Using of mobile application (m-Commerce) Ikens Group Jakarta, Indonesia.