A fishing reel of the present invention comprises a battery box that accommodates a replaceable battery in a side plate on a side opposite to a handle of a reel main body, a holding member that is movable integrally with a clutch operation member and holds a detection target unit, and a detection sensor that is disposed in the battery box and detects the moving detection target unit to determine whether a clutch mechanism is in an ON state or an OFF state. The holding member is engaged with a guide portion formed around the battery box, and the detection target unit is guided by the guide portion together with the holding member and moves when the clutch operation member moves.

An electric fishing reel comprises a reel main body that comprises a left frame and a right frame and side plates covering the left and right frames, an operating part that is provided on a side of the left frame or a side of the right frame and is rotatable, a handle shaft of the operating part, a drive gear that comprises a cylindrical portion and a tooth surface and is rotatably frictionally coupled to the handle shaft, and a drag washer that is non-rotatably fitted to the handle shaft and is provided at an end of the drive gear on a side in a direction of the handle shaft, in which a protruding portion protruding in a direction of the drive gear from an inside of the side plate covering the left frame or the right frame is provided, and an end of the protruding portion is formed to be separated by a distance equal to or less than 3.0 mm with respect to an upper surface of the drive gear as viewed in the direction of the handle shaft.