PROBLEM TO BE SOLVED: To provide a spinning reel for fishing in which a cover member can stably be attached to a reel body without receiving influence of size variations of the reel body and the cover member so much.SOLUTION: A spinning reel for fishing includes a reel body 1a, and a cover member 18 having a tip end 28 engaged to an engaging recess 27 formed in the reel body 1a and being mounted to the rear of the reel body 1a by a screw member. A tilt regulating part 31 becoming narrower as going to the insertion direction P of the tip end 28 is formed between the engaging recess 27 and the tip end 28. The tilt regulating part 31 is configured by including a vertical direction regulating part 32 becoming narrower with respect to the vertical direction and a left and right directions regulating part becoming narrower with respect to left and right directions. The tip end 28 is pressed to the engaging recess 27 through the tilt regulating part 31 by the tightening force of the screw member.SELECTED DRAWING: Figure 4【課題】リール本体やカバー部材の寸法のバラツキの影響をさほど受けず、カバー部材を安定してリール本体に取着できる魚釣用スピニングリールを提供する。【解決手段】リール本体1aと、リール本体1aに形成された係合凹部27に先端部28が係合し、ねじ部材によりリール本体1aの後部に取着されるカバー部材18と、を備えた魚釣用スピニングリールであって、係合凹部27と先端部28との間で、先端部28の挿入方向Pに向かうにしたがい狭小となる傾斜規制部31を形成し、傾斜規制部31は、上下方向に関して狭小となる上下方向規制部32と、左右方向に関して狭小となる左右方向規制部とを備えて構成され、ねじ部材の締付力により先端部28が傾斜規制部31を介して係合凹部27に押し付けられる。【選択図】図4