In a clutch mechanism for use in a fishing reel, one end of a torsion spring is connected to a flipping cam which is rotated between a pair of pins. When the flipping cam positions at one of the pins, the torsion spring biases the clutch mechanism selectively to its ON and OFF states depending upon the state of the clutch mechanism. On the other hand, when the flipping cam positions at the other one of the pins, the torsion spring continuously biases the clutch mechanism to its ON state irrespective of the state of the clutch mechanism. Thus, in the latter condition, the clutch mechanism is shifted and held at its OFF state only during when a force exceeding the biasing force of the torsion spring continues to be applied to the clutch mechanism, and immediately when the force is removed, the clutch mechanism automatically returns to its ON state by the biasing force of the torsion spring.