A reciprocating mechanism (31) for a fishing reel (1) includes a first rotating body (37), a second rotating body (39), a rotation transmission body (41, 141, 241) and a movable body (43). The first rotating body (37) is configured to rotate in conjunction with a winding operation of a handle (13) of the fishing reel (1). The second rotating body (39) is arranged spaced apart from the first rotating body (37) along a spool shaft (17) direction in which the spool shaft (17) of the fishing reel (1) extends. The rotation transmission body (41, 141, 241) is bridged between the first rotating body (37) and the second rotating body (39), and is configured to transmit the rotation of the first rotating body (37) to the second rotating body (39). The movable body (43) is configured to engage the rotation transmission body (41, 141, 241), and is configured to reciprocate in the spool shaft (17) direction accompanying an actuation of the rotation transmission body (41, 141, 241).
