A reel body (2, 302) for a fishing spinning reel (1, 301), comprising: a body front portion (12, 312); a drive body (7, 307) comprising a drive shaft sleeve (7, 307), the drive body being supported by the body front portion (12, 312) so that the drive shaft sleeve (7, 307) is rotatable about a rotation axis, the drive body (7, 307) being driven through a handle operation; an anti-reverse device (40, 340) comprising: a switching moving body (51, 351) movably provided on the reel body (2, 302) and configured to switch the drive body (7, 307) between a reverse-rotation inhibited state or a reverse-rotation allowed state,; and a switching retention section (60, 360) for restricting movement of the switching moving body (51, 351) so as to retain the reverse-rotation inhibited state or the reverse-rotation allowed state, wherein the switching retention section (60, 360) includes: a moving body (62, 362) provided in the reel body (2, 302); and an engagement retention portion (63, 363) provided in the switching moving body (51, 351), and wherein: the moving body (62, 362) and the engagement retention portion (63, 363) are arranged in the rotation axis direction so as to be opposed to each other, and the moving body (62, 362) is constantly biased toward the engagement retention portion (63, 363); the moving body (62, 362) is disposed in the body front portion (12, 312) of the reel body (2, 302) and is biased frontward, and the engagement retention portion (63, 363) is attached to a bottom surface of the switching moving body (51, 351) and is disposed so as to be engageably opposed to the moving body (62, 362); the switching moving body (51, 351) is made of a synthetic resin and is a bottomed cylindrical component surrounding the body front portion (12, 312) of the reel body (2, 302) and supported so as to be turnable by a predetermined angle, and the engagement retention portion (63, 363) is made of a metal. a body front portion (12, 312); a drive body (7, 307) comprising a drive shaft sleeve (7, 307), the drive body being supported by the body front portion (12, 312) so that the drive shaft sleeve (7, 307) is rotatable about a rotation axis, the drive body (7, 307) being driven through a handle operation; an anti-reverse device (40, 340) comprising: a switching moving body (51, 351) movably provided on the reel body (2, 302) and configured to switch the drive body (7, 307) between a reverse-rotation inhibited state or a reverse-rotation allowed state,; and a switching retention section (60, 360) for restricting movement of the switching moving body (51, 351) so as to retain the reverse-rotation inhibited state or the reverse-rotation allowed state, a switching moving body (51, 351) movably provided on the reel body (2, 302) and configured to switch the drive body (7, 307) between a reverse-rotation inhibited state or a reverse-rotation allowed state,; and a switching retention section (60, 360) for restricting movement of the switching moving body (51, 351) so as to retain the reverse-rotation inhibited state or the reverse-rotation allowed state, wherein the switching retention section (60, 360) includes: a moving body (62, 362) provided in the reel body (2, 302); and an engagement retention portion (63, 363) provided in the switching moving body (51, 351), and a moving body (62, 362) provided in the reel body (2, 302); and an engagement retention portion (63, 363) provided in the switching moving body (51, 351), and wherein: the moving body (62, 362) and the engagement retention portion (63, 363) are arranged in the rotation axis direction so as to be opposed to each other, and the moving body (62, 362) and the engagement retention portion (63, 363) are arranged in the rotation axis direction so as to be opposed to each other, and the moving body (62, 362) is constantly biased toward the engagement retention portion (63, 363); the moving body (62, 362) is disposed in the body front portion (12, 312) of the reel body (2, 302) and is biased frontward, and the engagement retention portion (63, 363) is attached to a bottom surface of the switching moving body (51, 351) and is disposed so as to be engageably opposed to the moving body (62, 362); the switching moving body (51, 351) is made of a synthetic resin and is a bottomed cylindrical component surrounding the body front portion (12, 312) of the reel body (2, 302) and supported so as to be turnable by a predetermined angle, and the engagement retention portion (63, 363) is made of a metal.