To provide a processor of an endoscope apparatus that suppresses the influence of electromagnetic noise even during endoscopic work using a high-frequency treatment instrument. SOLUTION: A recessed portion 210 is formed in a side surface 100 S of a processor 100, and a return terminal 35 inserted through an insulating member 230 is installed in a recess 210. The tip end face 35T of the return terminal 35 does not protrude from the side face 100S of the processor 100 and is located on the inner side of the processor with respect to the side face 100S. (FIG.【課題】高周波処置具を使用する内視鏡作業時においても、電磁ノイズの影響を抑える内視鏡装置のプロセッサを提供する。【解決手段】プロセッサ100の側面100Sに、凹部210を形成し、絶縁部材230に挿通された帰還端子35を凹部210に設置する。帰還端子35の先端面35Tは、プロセッサ100の側面100Sから突出しておらず、側面100Sよりもプロセッサ内部側に位置する。【選択図】図2
