The aim of this study is to examine the change of Electroencephalogram (EEG) and concentration by practicing acupressure at the GB20 on normal humans. We selected 36 children and divided them into GB20 group and SP6 group. Electrode was measured in Fp1 and Fp2, and EEG was measured before and after practicing acupressure at the GB20 and SP6. Sensorimotor rhythm (SMR) increased significantly at the GB20 group (p=0.043). M-$eta$ wave increased significantly at the GB20 group (p=0.022). H-$eta$ wave increased significantly at the GB20 group (p=0.040). $gamma$ wave increased significantly at the GB20 group (p=0.021). $(SMR+M-eta)/Theta$ ratio increased significantly at the GB20 group (p=0.023). $eta/Theta$ ratio increased significantly at the GB20 group (p=0.020). On the other hand, $alpha$ and $Theta$ wave did not have significant changes. Through this experiment, we conclude that acupressure at the GB20 on normal humans could increase the ability of concentration.