The aim of the study is to examine the effects of core training in 9-10 years aged male handball players on selected biomotor and techniques special to the branch. This research is an experimental study in the screening model. The study consists of a total of 26 male volunteer students, including the experimental (n=13) and Control (N=13) group. The data of the study was uploaded to the SPSS program and measured by the Shapiro-Wilk test, Independent Sample T test, Paired Sample t test for normality tests. The level of significance was adopted as a=0.05. The core training has been applied to the experiment group for 25 to 30 min three days a week at the same time for 8 weeks with their own body weights along with handball training whereas only the handball training has just been applied to the control group without any extra work and they have continued to their daily life. Before the study, the pretest measurements of physical (height, weight, bki), biomotor (vertical vault, flexibility, back-leg strength, 20 m speed, balance, agility, clutch power) and the techniques peculiar to the branch (dribbling, quick pass, point shooting) have been taken in the experiment and control groups. According to the pretest measurements, it has been detected that both groups have homogeneous pattern (p > 0.005). As a result of the pretest-posttest measurements in the experiment group, statistically remarkable difference has been detected in the parameters of vertical vault (p=0.000*), flexibility (p=0.000*), 20 m speed (p=0.000*), balance (p=0.000*), right hand clutch power (p=0.000*), agility (p=0.000*), back-leg strength (p=0.000*), dribbling (p=0.000*), quick pass is (p=0.000*), and point shooting (p=0.000*). However, statistically significant difference hasn't been detected in the parameter of left hand grasping power (p > 0.005). The reason of the difference can be thought that players have used their dominant (right) hand. The core training that has been applied with their own body weights along with handball training for 8 weeks has provided positive improvements on measured biomotor and techniques special to the branch of the handball players.