A binding machine comprising: a wire feeding unit (3A, 3B, 3C) configured to feed a wire to be wound on an object to be bound, and a binding unit configured to twist the wire wound on the object to be bound, wherein the wire feeding unit (3A, 3B, 3C) comprises: a pair of feeding members (30L, 30R) configured to sandwich the wire between the pair of feeding members (30L, 30R) and to feed the wire by a rotating operation, a wire feeding drive unit connected to one feeding member and configured to rotatively drive the one feeding member, and a load reducing part configured to reduce or remove a load, which is to be applied to the wire via the one feeding member connected to the wire feeding drive unit, characterized in that the load reducing part comprises: a coupling part mounted to a shaft of the wire feeding drive unit via a gear; and a coupled part connected to the one feeding member and contactable with the coupling part, the coupling part and the coupled part are arranged coaxially with each other, the coupling part and the coupled part face each other in axial directions thereof, the coupling part has a coupling convex portion formed on a surface facing the coupled part and protruding toward the coupled part, the coupled part has a coupled convex portion (35b1) formed on a surface facing the coupling part and protruding toward the coupling part, and when the coupling convex portion and the coupled convex portion (35b1) are contacted, the drive force of the wire feeding drive unit is transmitted to the one feeding member. a wire feeding unit (3A, 3B, 3C) configured to feed a wire to be wound on an object to be bound, and a binding unit configured to twist the wire wound on the object to be bound, wherein the wire feeding unit (3A, 3B, 3C) comprises: a pair of feeding members (30L, 30R) configured to sandwich the wire between the pair of feeding members (30L, 30R) and to feed the wire by a rotating operation, a wire feeding drive unit connected to one feeding member and configured to rotatively drive the one feeding member, and a load reducing part configured to reduce or remove a load, which is to be applied to the wire via the one feeding member connected to the wire feeding drive unit, characterized in that the load reducing part comprises: a coupling part mounted to a shaft of the wire feeding drive unit via a gear; and a coupled part connected to the one feeding member and contactable with the coupling part, the coupling part and the coupled part are arranged coaxially with each other, the coupling part and the coupled part face each other in axial directions thereof, the coupling part has a coupling convex portion formed on a surface facing the coupled part and protruding toward the coupled part, the coupled part has a coupled convex portion (35b1) formed on a surface facing the coupling part and protruding toward the coupling part, and when the coupling convex portion and the coupled convex portion (35b1) are contacted, the drive force of the wire feeding drive unit is transmitted to the one feeding member. a pair of feeding members (30L, 30R) configured to sandwich the wire between the pair of feeding members (30L, 30R) and to feed the wire by a rotating operation, a wire feeding drive unit connected to one feeding member and configured to rotatively drive the one feeding member, and a load reducing part configured to reduce or remove a load, which is to be applied to the wire via the one feeding member connected to the wire feeding drive unit, characterized in that the load reducing part comprises: a coupling part mounted to a shaft of the wire feeding drive unit via a gear; and a coupled part connected to the one feeding member and contactable with the coupling part, the coupling part and the coupled part are arranged coaxially with each other, the coupling part and the coupled part face each other in axial directions thereof, the coupling part has a coupling convex portion formed on a surface facing the coupled part and protruding toward the coupled part, the coupled part has a coupled convex portion (35b1) formed on a surface facing the coupling part and protruding toward the coupling part, and when the coupling convex portion and the coupled convex portion (35b1) are contacted, the drive force of the wire feeding drive unit is transmitted to the one feeding member. a coupling part mounted to a shaft of the wire feeding drive unit via a gear; and a coupled part connected to the one feeding member and contactable with the coupling part, the coupling part and the coupled part are arranged coaxially with each other, the coupling part and the coupled part face each other in axial directions thereof, the coupling part has a coupling convex portion formed on a surface facing the coupled part and protruding toward the coupled part, the coupled part has a coupled convex portion (35b1) formed on a surface facing the coupling part and protruding toward the coupling part, and when the coupling convex portion and the coupled convex portion (35b1) are contacted, the drive force of the wire feeding drive unit is transmitted to the one feeding member.