Endoscopic hemostasis is an essential skill for endoscopists and has been the first-line treatment.1 For example, we reported that 70% of bleeding ulcers were treated with endoscopic hemostasis.2 Endoscopic hemostasis, similar to most techniques, is currently acquired through on-the-job training with real patients. However, such high-risk situations are not preferable for trainees. To perform a hemostatic procedure safely, the operator needs skills such as maintaining an appropriate view, stabilizing the scope, and controlling hemostatic devices precisely.