X-ray module

An X-ray module comprising:

• a housing in which an opening portion is formed;
• an electron gun that emits an electron beam inside the housing;
• a target that includes an electron-incident surface and an X-ray-emitting surface opposite the electron-incident surface, and that transmits an X-ray generated when the electron beam is incident on the electron-incident surface and emits the X-ray from the X-ray-emitting surface;
• an X-ray-emitting window that seals the opening portion, and that transmits the X-ray emitted from the target and emits the X-ray to a first side in an axial direction;
• and
• a heat radiating unit disposed outside the housing,
• wherein the housing includes a surface on which a protrusion protruding to the first side is formed, the opening portion is formed in the protrusion, and the target is disposed in the opening portion, and
• the heat radiating unit includes a first portion extending along the surface and thermally connected to the surface, and a second portion extending from the first portion to a second side opposite the first side.