The objective was to describe the relationship between electronic commerce and the quality of customer service in the Millennial generationof the Lima fence, presenting a mixed, quantitative and qualitative approach, also mentioning that the type of study was theoretical, the sample consisted of 283 young people from the Millennial generation of the Lima fence, the method used to resolve theresults was hypothetical deductive, using Spearman's Rho statistic to study the dependency relationship between variables and their dimensions, the technique was also used survey and the questionnaire instrument for the variables electronic commerce and quality of service, with a Likert scale. The instrument was validated with Cronbach's alpha test, showing a reliability value of 0.89 as a result, the calculation of the variables and their dimensions was also used through the Kolmogorv -Smirnov normality test with significance of 0.00 when not finding a normal distribution, the calculation of the mean and interquartile range was performed. Finally, it was determined that there is a positive average relationship between the variables, electronic commerce and quality of customer service in the Millennial generation of the Lima fence.