TWI747221B

The objective of the present invention is to provide a substrate unit for a double shaft reel, in which a hand winding type handle can be used for both right-handed and left-handed specifications. According to the present invention, a substrate unit (40) for a double shaft reel is a substrate unit (40) for a double shaft reel, which is used for a double shaft reel having two specifications in which arrangement of a magnet (18) for position detection of a drive operation part (17) is laterally reversed according to a hand winding type handle (13) for winding a fishing line is for a right hand or a left hand. The substrate unit (40) for a double shaft reel comprises: a circuit board (60B); a flat cable (70) extending from an upper surface or lower surface of the circuit board (60B) to at least one of right and left sides, and being changed in arrangement so as to extend in the left or the right side according to one or the other specification out of the two specifications; and a magnetic sensor (19) which is at