Valve structure and turbocharger

A valve structure comprising:

• a valve unit including a valve body, a shaft portion extending from the valve body in an axial direction, and a separating portion provided on the shaft portion and spaced apart from the valve body in the axial direction;
• a mounting plate located between the valve body and the separating portion and including an insertion hole into which the shaft portion is inserted;
• a holding portion including a first holding surface provided on the mounting plate, and a second holding surface provided on the valve unit and spaced apart from the first holding surface in the axial direction;
• a protrusion provided on one of the valve unit and the mounting plate, an end of the protrusion protruding in the axial direction beyond the first holding surface and the second holding surface;
• and
• an elastic body including a contact portion located between the first holding surface and the second holding surface, and a pressed portion located inside or outside the contact portion in a radial direction of the shaft portion and contacting the protrusion.