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 rotable manner, wherein the plurality of foils each comprising: a first holding portion formed at one circumferential end and held while in contact with the outer member; a second holding portion formed at another circumferential end and held while in contact with the outer member; and a body portion formed circumferentially between the first holding portion and the second holding portion and has a bearing surface, wherein the first holding portion and the second holding portion of adjacent two of the plurality of foils are intersected with each other in an axial view, wherein the first holding portion and the second holding portion of the each of the plurality of foils are arranged on a radially outer side with respect to the body portion of adjacent foils, characterized in that first fixing grooves are formed in the inner circumferential surface of the outer member, the first fixing grooves extend along a direction inclined by an angle (θ1) with respect to the circumferential direction, and in that the first holding portion of the each of the plurality of foils is inserted to the first fixing groove of the outer member and is slidable on the first fixing groove of the outer member in the direction inclined by an angle (θ1) with respect to the circumferential direction. 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 rotable manner, wherein the plurality of foils each comprising: a first holding portion formed at one circumferential end and held while in contact with the outer member; a second holding portion formed at another circumferential end and held while in contact with the outer member; and a body portion formed circumferentially between the first holding portion and the second holding portion and has a bearing surface, a first holding portion formed at one circumferential end and held while in contact with the outer member; a second holding portion formed at another circumferential end and held while in contact with the outer member; and a body portion formed circumferentially between the first holding portion and the second holding portion and has a bearing surface, wherein the first holding portion and the second holding portion of adjacent two of the plurality of foils are intersected with each other in an axial view, wherein the first holding portion and the second holding portion of the each of the plurality of foils are arranged on a radially outer side with respect to the body portion of adjacent foils, characterized in that first fixing grooves are formed in the inner circumferential surface of the outer member, the first fixing grooves extend along a direction inclined by an angle (θ1) with respect to the circumferential direction, and in that the first holding portion of the each of the plurality of foils is inserted to the first fixing groove of the outer member and is slidable on the first fixing groove of the outer member in the direction inclined by an angle (θ1) with respect to the circumferential direction.