Patent ID: 8610061

Claim:
An electron microscope having an electron gun for emitting electron rays, a scanning deflection device for converging and deflecting the electron rays emitted from the electron gun and irradiating the electron rays onto an observation object, and at least one of a secondary electron detector for detecting secondary electrons emitted from the observation object in response to irradiation of the electron rays and a reflected electron detector for detecting reflected electrons emitted from the observation object in response to irradiation of the electron rays, further comprising a lens barrel having an open end on the side toward which the electron rays emitted from the electron gun travels and containing at least the electron gun and the scanning deflection device; and a seal member which is provided at the open end edge of the lens barrel and is brought into contact with the observation object, wherein the lens barrel is fixed in direct and close contact with the observation object by creating a vacuum in the lens barrel so that the observation object can be attracted to the lens barrel via the seal member.