A camera head includes a coupler member which is detachably connected to an eyepiece unit of an endoscope and configured to capture an object image emitted from the eyepiece unit. The coupler member includes an abutting portion which is rigid and configured to abut on the eyepiece unit at a plurality of points when at least the eyepiece unit is coupled, and a biasing member configured to apply a biasing force for the eyepiece unit to the abutting portion.
