Blood flow measurement device

A blood flow measurement device comprising:

• an irradiation unit that has a light source emitting near-infrared rays and irradiates an object with the near-infrared rays;
• and
• a light receiving section that has a light receiving element for measuring scattered light that is irradiated from the irradiation unit and scattered by the object,
• wherein in a case where a configuration in which the irradiation unit has an irradiation unit light guide plate that guides the near-infrared rays emitted from the light source and an irradiation diffraction element for emitting the near-infrared rays guided in the irradiation unit light guide plate from the irradiation unit light guide plate to irradiate the object with the near-infrared rays is defined as a first configuration, and
• a configuration in which the light receiving section has a light receiving section light guide plate that guides the scattered light scattered by the object and a light receiving diffraction element for allowing the scattered light scattered by the object to be incident on the light receiving section light guide plate is defined as a second configuration,
• the blood flow measurement device has at least one of the first configuration or the second configuration.