A foil bearing, comprising: an outer member that has an inner circumferential surface having a cylindrical surface shape; and a plurality of foils that are mounted to the inner circumferential surface of the outer member, the foil bearing being configured to radially support a shaft inserted on an inner circumference of the outer member in a freely relatively rotatable manner, wherein the plurality of foils each comprises: a) a first holding portion formed at one circumferential end and held while in contact with the outer member; b) a second holding portion formed at another circumferential end and held while in contact with the outer member; and c) a body portion being formed circumferentially between the first holding portion and the second holding portion and having a bearing surface, d) wherein the first holding portion of the each of the plurality of foils is held in a slidable state in a first fixing groove formed in the inner circumferential surface of the outer member, e) wherein a boundary portion between a circumferential end of the body portion and the first holding portion of the each of the plurality of foils is smoothly continued without being bent, f) wherein the first fixing groove of the each of the plurality of foils is inclined radially outward to one circumferential end side, g) wherein the circumferential end of the body portion on the side of the first holding portion of the each of the plurality foils is raised radially inward with respect to the inner circumferential surface of the outer member and curved to form a radially inward convex, and h) wherein a rising angle θ1 at the circumferential end of the body portion with respect to the inner circumferential surface of the outer member is set to 30° or less. an outer member that has an inner circumferential surface having a cylindrical surface shape; and a plurality of foils that are mounted to the inner circumferential surface of the outer member, the foil bearing being configured to radially support a shaft inserted on an inner circumference of the outer member in a freely relatively rotatable manner, wherein the plurality of foils each comprises: a) a first holding portion formed at one circumferential end and held while in contact with the outer member; b) a second holding portion formed at another circumferential end and held while in contact with the outer member; and c) a body portion being formed circumferentially between the first holding portion and the second holding portion and having a bearing surface, d) wherein the first holding portion of the each of the plurality of foils is held in a slidable state in a first fixing groove formed in the inner circumferential surface of the outer member, e) wherein a boundary portion between a circumferential end of the body portion and the first holding portion of the each of the plurality of foils is smoothly continued without being bent, f) wherein the first fixing groove of the each of the plurality of foils is inclined radially outward to one circumferential end side, g) wherein the circumferential end of the body portion on the side of the first holding portion of the each of the plurality foils is raised radially inward with respect to the inner circumferential surface of the outer member and curved to form a radially inward convex, and h) wherein a rising angle θ1 at the circumferential end of the body portion with respect to the inner circumferential surface of the outer member is set to 30° or less. a) a first holding portion formed at one circumferential end and held while in contact with the outer member; b) a second holding portion formed at another circumferential end and held while in contact with the outer member; and c) a body portion being formed circumferentially between the first holding portion and the second holding portion and having a bearing surface, d) wherein the first holding portion of the each of the plurality of foils is held in a slidable state in a first fixing groove formed in the inner circumferential surface of the outer member, e) wherein a boundary portion between a circumferential end of the body portion and the first holding portion of the each of the plurality of foils is smoothly continued without being bent, f) wherein the first fixing groove of the each of the plurality of foils is inclined radially outward to one circumferential end side, g) wherein the circumferential end of the body portion on the side of the first holding portion of the each of the plurality foils is raised radially inward with respect to the inner circumferential surface of the outer member and curved to form a radially inward convex, and h) wherein a rising angle θ1 at the circumferential end of the body portion with respect to the inner circumferential surface of the outer member is set to 30° or less.