A radial foil bearing (3, 20) for enclosing and supporting a rotary shaft, the radial foil bearing comprising: a cylindrical top foil (10, 21) disposed so as to face the rotary shaft, a back foil disposed on a radially outer side of the top foil; and a cylindrical bearing housing (12, 25) accommodating the top foil (10, 21) and the back foil, wherein the top foil (10, 21) is formed by winding a rectangular metal foil around the rotary shaft in a circumferential direction thereof, wherein the metal top foil (10, 21) includes a first uneven portion (17a, 24a) which has a first projecting portion (15a, 22a) and a first depressed portion (16a, 23a) on a first side of the metal top foil (10, 21), and a second uneven portion (17b, 24b) which has a second depressed portion (16b, 23b) formed so as to include a position corresponding to the first projecting portion (15a, 22a) and a second projecting portion (15b, 22b) formed in at least a portion of a position corresponding to the first depressed portion (16a, 23a), on a second side opposite to the first side, characterized in that the metal top foil (10, 21) is wound in a cylindrical shape so that the first uneven portion (17a, 24a) and the second uneven portion (17b, 24b) overlap with each other, wherein the first projecting portion (15a, 22a) and the second projecting portion (15b, 22b) are pulled out near the bearing housing (12, 25) through the second depressed portion (16b, 23b) and the first depressed portion (16a, 23a) respectively, wherein engagement grooves (13, 26) are formed on an inner circumferential surface of the bearing housing (12, 25) in an axial direction of the bearing housing, and wherein the first projecting portion (15a, 22a) and the second projecting portion (15b, 22b), which are pulled out near the bearing housing (12, 25), engage with the corresponding engagement grooves (13, 26). a cylindrical top foil (10, 21) disposed so as to face the rotary shaft, a back foil disposed on a radially outer side of the top foil; and a cylindrical bearing housing (12, 25) accommodating the top foil (10, 21) and the back foil, wherein the top foil (10, 21) is formed by winding a rectangular metal foil around the rotary shaft in a circumferential direction thereof, wherein the metal top foil (10, 21) includes a first uneven portion (17a, 24a) which has a first projecting portion (15a, 22a) and a first depressed portion (16a, 23a) on a first side of the metal top foil (10, 21), and a second uneven portion (17b, 24b) which has a second depressed portion (16b, 23b) formed so as to include a position corresponding to the first projecting portion (15a, 22a) and a second projecting portion (15b, 22b) formed in at least a portion of a position corresponding to the first depressed portion (16a, 23a), on a second side opposite to the first side, characterized in that the metal top foil (10, 21) is wound in a cylindrical shape so that the first uneven portion (17a, 24a) and the second uneven portion (17b, 24b) overlap with each other, wherein the first projecting portion (15a, 22a) and the second projecting portion (15b, 22b) are pulled out near the bearing housing (12, 25) through the second depressed portion (16b, 23b) and the first depressed portion (16a, 23a) respectively, wherein engagement grooves (13, 26) are formed on an inner circumferential surface of the bearing housing (12, 25) in an axial direction of the bearing housing, and wherein the first projecting portion (15a, 22a) and the second projecting portion (15b, 22b), which are pulled out near the bearing housing (12, 25), engage with the corresponding engagement grooves (13, 26).