Objective. This study aims to examine the effectiveness of the part and whole combination-based smash training model on smash techniques in volleyball athletes aged 11-12 years.  Materials and method. This study used an experimental field testing method, with a pretest-posttest control group design approach. The participants were 52 male volleyball athletes aged 11-12 years and had an average weight and height of ±36.02 kg and ±144.63cm. The instrument used to measure the smash technique was a volleyball skill test.  Results. The results of the descriptive analysis showed differences in the mean and standard deviation of the conventional group and the experimental group. The average value of the conventional group is 75.562 with a standard deviation of 8.7956, while the average value of the experimental group is 87.492 with a standard deviation of 1.9343. Hypothesis testing conducted using Mann-Whitney analysis found that the value of Asymp sig (2-tailed) was 0.000 <0.05, which indicates that the hypothesis is accepted.  Conclusions. Knowing the descriptive results and hypothesis testing, it is concluded that the experimental group experienced a significant improvement and was better than the conventional group. Based on the category of posttest average result assessment, the experimental group was included in the very good category. In other words, the experimental group was very competent. On this basis, this research can be used as a reference in training smash techniques for volleyball athletes at the beginner age.