A spinning reel drag knob (61) screwed onto a distal end of a spool shaft (15) has a knob member (66), a nut member (67) and a sealing member (68). The knob member (66) presses a drag washer of a drag mechanism (60), and includes a circular rimmed portion (70b) and a cylindrical outer periphery (70c). The rimmed portion has a knob portion (70a) on a front surface of the rimmed portion to regulate drag force. The outer periphery (70c) is formed on a back side (70j) of the rimmed portion. The nut member (67) is disposed in the knob member and is unitarily rotatable with the knob member. The seating member (68) includes an attachment portion (68a), a first sealing portion (68b), and a second scaling portion (68c). The attachment portion (68a) is attached to the outer periphery (70c). The first sealing portion (68b) contacts an inner peripheral surface (4i) of the spool (4), and the second sealing portion (68a) makes contact with a radial outward part of the back side (70j).
