The aim of this study was to determine the effect of resistance band training on javelin accuracy, speed, agility, balance and strength in mounted javelin athletes. In the study, a quasi-experimental design with pre-test post-test control group was used. Twenty-four mounted javelin athletes voluntarily participated in the study. All participants were homogeneously distributed into two groups as experimental group (n=12) and control group (n=12) according to the results of the target hitting pre-test. Both groups were subjected to mounted javelin training for 8 weeks. In addition to javelin training, the experimental group practiced strength training with resistance band for 8 weeks. In the study, the participants were administered speed, agility, balance, vertical jump tests as pre-test and post-test as well as the javelin accuracy test developed by the researcher. The SPSS package program was used in the analysis of the data obtained, the normality of the data was examined and non-parametric tests and pairwise comparison analyzes were performed according to their distribution. There were significant differences between the pre-test and post-test averages of the experimental group and between the experimental and control groups (p<0.05). As a result, it shows that strength training with resistance band in addition to javelin training improves speed, balance, vertical jump, agility and javelin accuracy in mounted javelin athletes.