A line stopper (8) for a fishing reel includes a line stopper member (20) that includes a fishing line catching portion (21) and a support shaft portion (22), and a supporting member (10) that supports the line stopper member (20) and fits in a through hole (9) formed in a main body of the fishing reel. On one of the fishing line catching portion (21) or the supporting member (10), a protrusion (21b, 11e) is provided at a left or right side or both the left and right sides of the support shaft portion (22) in a width direction of the supporting member (10) in a plan view where the fishing line catching portion (21) and the supporting member (10) overlap each other.