A spool of a spinning reel includes a support member, a spool body, a drag mechanism, a first sealing member, and a second sealing member. The support member is detachably connected to a spool shaft. The spool body includes a housing recess that is frontally open and rotatably attached to the support member. The drag mechanism decelerates the spool body and includes a front friction portion that has a press washer with an inner peripheral surface opposed to an outer peripheral surface of a front portion of the support member. The press washer contacts a drag regulation member. The housing recess accommodates the friction portion. The first sealing member seals a gap created between the inner peripheral surface of the press washer and the outer peripheral surface of the support member. The second sealing member seals the gap created between the outer peripheral surface of the press washer and the housing recess.