This research attempted to determine the effectiveness of a basic counselling skill training model with the cycle learning method on the interpersonal communication of PTKI students in Semarang City. It was a quantitative research which employed a quasi-experimental approach. In this research, the subjects were sampled using a cluster random sampling technique with class A appointed as the experimental class and class B as the control class. All classes data were analyzed in terms of difference test, effectiveness test for each variable, and correlation test among variable. Findings indicated an increase in the mean of environmental care attitude and learning outcomes of the experimental class, namely 43.04 and 44.73 respectively, while the control group obtained 26.23 and 24.38. Moreover, the effectiveness test for each variable resulted an Asymp value. Sig. (2-tailed) of 0.000 <probability value of 0.05 for environmental care attitude and Asymp value. Sig. (2-tailed) of 0.000 <probability value of 0.05 for learning outcomes. The correlation test between variables resulted a value of rxy = 0.617 and was concluded to be significant with a fairly strong correlation. Thus, the application of a basic counseling skill training model with the cycle learning method is effective to improve the interpersonal communication of PTKI students in Semarang City.