Problem: To reduce the weight of a reel body without forfeiting the design of the rear portion of a reel body. Solution: The reel body 2 is the reel body of a spinning reel capable of delivering fishing line forward and is comprised of a housing 21, a cover member 22, and a guard member 23. The housing 21 has a housing space 21 a wherein the first side face is opened, a sidewall 21 b that demarcates the second side face of the housing space 21 a and opposes the first side face, and a rear wall 21 c that demarcates the rear face of the housing space 21 a. The protruding piece 21 d, which is the rear portion of the sidewall 21 b, extends more toward the rear than the rear wall 21 c. The cover member 22 is mounted to the housing 21 to cover the opening of the housing space 21 a. The guard member 23 is mounted from the rear of the housing 21 and the cover member 22 to form a space between the protruding piece 21 d and the rear wall 21 c.
