This study was conducted as a descriptive correlational research with the purpose of examining the mediator role of life satisfaction in the relationship between time management and communication skills of graduate students attending to master's and PhD programs in higher education. The study sample included 591 students (348 males and 243 females; and age range = 22 to 56). The data were collected using data collection instruments such as The Free Time Management Scale (FTMS), Communication Skills Scale (CSS), and Higher Education Life Satisfaction Scale (HELSS). SPSS and AMOS programs were used for data analysis. The data were analyzed using Pearson' correlation, confirmatory factor analysis (CFA), mediation analysis. The findings of the study showed that life satisfaction was a partial mediator in the relationship between time management and communication skills of master's and PhD students. As the numbers of studies examining the relationship among graduate students' time management, communication skills and life satisfaction in master's and PhD programs are quite rare, this research is aimed to make contributions to literature for such matter.