Thrust foil bearing

A thrust foil bearing, comprising:

• a base plate including an insertion hole through which a shaft is inserted;
• and
• a top foil disposed around the insertion hole, wherein
• the top foil includes:
• a slit dividing the top foil into an inner area and an outer area in a radial direction of the insertion hole,
• a sandwiched part disposed in the outer area,
• an extending part extending from the sandwiched part to the inner area, and
• an inclined part being in the inner area, having an end on one side in a circumferential direction of the insertion hole connected to the extending part through a first bent part, extending from the first bent part toward another side in the circumferential direction, and inclined with respect to a flat surface of the base plate extending a direction orthogonal to an axial direction of the insertion hole,
• the extending part, the first bent part, and the inclined part are disposed in this order in the circumferential direction,
• the first bent part is formed of a first bend and a second bend positioned on the other side in the circumferential direction of the first bend, the first bend is bent to be convex toward the base plate, the second bend is bent to be convex in a direction away from the base plate,
• the slit extends further toward the one side in the circumferential direction than the first bent part.