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, extending from the extending 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, characterized in that an edge being on the one side in the circumferential direction of the inclined part and extending from a radially inner side to a radially outer side is connected to the extending part through a first bent part, 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 protrude toward the base plate, the second bend is bent to protrude toward a thrust collar that the thrust foil bearing is adapted to face, and the first bent part has a stepped shape, and the slit further extends toward the one side in the circumferential direction than the first bent part. 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, extending from the extending 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, characterized in that an edge being on the one side in the circumferential direction of the inclined part and extending from a radially inner side to a radially outer side is connected to the extending part through a first bent part, 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 protrude toward the base plate, the second bend is bent to protrude toward a thrust collar that the thrust foil bearing is adapted to face, and the first bent part has a stepped shape, and the slit further extends toward the one side in the circumferential direction than the first bent part. 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, extending from the extending 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, characterized in that an edge being on the one side in the circumferential direction of the inclined part and extending from a radially inner side to a radially outer side is connected to the extending part through a first bent part, 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 protrude toward the base plate, the second bend is bent to protrude toward a thrust collar that the thrust foil bearing is adapted to face, and the first bent part has a stepped shape, and the slit further extends toward the one side in the circumferential direction than the first bent part.