A spinning reel includes a main shaft, a crank for driving the main shaft to rotate, a spool shaft, a cam mechanism configured to translate rotation of the main shaft into linear reciprocating motion of the spool shaft, a tubular worm, a rotor coupled to the tubular worm to rotate therewith, a spool coupled to the spool shaft to move therewith, and a speed variation means which includes an output wheel for driving the tubular worm to rotate, a sun planetary gear system coupling the main shaft to the output wheel, and a coupler. The coupler is shiftable between a first position, where the output wheel and the main shaft are rotated at different speeds, and a second position, where the output wheel and the main shaft are rotated at the same speed.
