A reel body for a fishing spinning reel , comprising: a body front portion ; a drive body comprising a drive shaft sleeve , the drive body being supported by the body front portion so that the drive shaft sleeve is rotatable about a rotation axis , the drive body being driven through a handle operation; an anti-reverse device comprising: a switching moving body movably provided on the reel body and configured to switch the drive body between a reverse-rotation inhibited state or a reverse-rotation allowed state,; and a switching retention section for restricting movement of the switching moving body so as to retain the reverse-rotation inhibited state or the reverse-rotation allowed state, wherein the switching retention section includes: a moving body provided in the reel body ; and an engagement retention portion provided in the switching moving body , and wherein: the moving body and the engagement retention portion are arranged in the rotation axis direction so as to be opposed to each other, and the moving body is constantly biased toward the engagement retention portion ; the moving body is disposed in the body front portion of the reel body and is biased frontward, and the engagement retention portion is attached to a bottom surface of the switching moving body and is disposed so as to be engageably opposed to the moving body ; the switching moving body is made of a synthetic resin and is a bottomed cylindrical component surrounding the body front portion of the reel body and supported so as to be turnable by a predetermined angle, and the engagement retention portion is made of a metal. a body front portion ; a drive body comprising a drive shaft sleeve , the drive body being supported by the body front portion so that the drive shaft sleeve is rotatable about a rotation axis , the drive body being driven through a handle operation; an anti-reverse device comprising: a switching moving body movably provided on the reel body and configured to switch the drive body between a reverse-rotation inhibited state or a reverse-rotation allowed state,; and a switching retention section for restricting movement of the switching moving body so as to retain the reverse-rotation inhibited state or the reverse-rotation allowed state, a switching moving body movably provided on the reel body and configured to switch the drive body between a reverse-rotation inhibited state or a reverse-rotation allowed state,; and a switching retention section for restricting movement of the switching moving body so as to retain the reverse-rotation inhibited state or the reverse-rotation allowed state, wherein the switching retention section includes: a moving body provided in the reel body ; and an engagement retention portion provided in the switching moving body , and a moving body provided in the reel body ; and an engagement retention portion provided in the switching moving body , and wherein: the moving body and the engagement retention portion are arranged in the rotation axis direction so as to be opposed to each other, and the moving body and the engagement retention portion are arranged in the rotation axis direction so as to be opposed to each other, and the moving body is constantly biased toward the engagement retention portion ; the moving body is disposed in the body front portion of the reel body and is biased frontward, and the engagement retention portion is attached to a bottom surface of the switching moving body and is disposed so as to be engageably opposed to the moving body ; the switching moving body is made of a synthetic resin and is a bottomed cylindrical component surrounding the body front portion of the reel body and supported so as to be turnable by a predetermined angle, and the engagement retention portion is made of a metal. <EOS>