A binding machine comprising: a first body part having a first housing and a handle including a pair of grips (120R, 120L) that can be grasped by an operator, the first housing being provided with a battery mounting part configured to mount a battery, and at least one grip of the pair of grips (120R, 120L) being provided with an operation switch; a second body part having a curl guide configured to curl a wire around a binding object, a second housing, a twisting unit accommodated in the second housing, and a control device, the twisting unit including a twisting motor, a deceleration mechanism for performing deceleration and torque amplification of the twisting motor, a twisting shaft connected to the deceleration mechanism and configured to rotate by rotation of the twisting motor for twisting the curled wire, a movable member configured to be displaced by a rotating operation of the twisting shaft, and a holding part projecting from a tip end-side of the movable member and for holding and twisting the wire; and a connecting part connecting the first body part and the second body part, wherein the connecting part is an elongated hollow member and a wiring is laid in the inside thereof, and the wiring is configured to be connected to the battery and the operation switch of the first body part and the control device of the second body part so that communication of electric signals between the first body part and the second body part and power supply from the first body part to the second body part is performed through the wiring, wherein the pair of grips (120R, 120L) are provided on respective both sides of an axis line of the connecting part or an extension line of the axis line, as seen from an operator-side when the operator grasps and operates the grips. a first body part having a first housing and a handle including a pair of grips (120R, 120L) that can be grasped by an operator, the first housing being provided with a battery mounting part configured to mount a battery, and at least one grip of the pair of grips (120R, 120L) being provided with an operation switch; a second body part having a curl guide configured to curl a wire around a binding object, a second housing, a twisting unit accommodated in the second housing, and a control device, the twisting unit including a twisting motor, a deceleration mechanism for performing deceleration and torque amplification of the twisting motor, a twisting shaft connected to the deceleration mechanism and configured to rotate by rotation of the twisting motor for twisting the curled wire, a movable member configured to be displaced by a rotating operation of the twisting shaft, and a holding part projecting from a tip end-side of the movable member and for holding and twisting the wire; and a connecting part connecting the first body part and the second body part, wherein the connecting part is an elongated hollow member and a wiring is laid in the inside thereof, and the wiring is configured to be connected to the battery and the operation switch of the first body part and the control device of the second body part so that communication of electric signals between the first body part and the second body part and power supply from the first body part to the second body part is performed through the wiring, wherein the pair of grips (120R, 120L) are provided on respective both sides of an axis line of the connecting part or an extension line of the axis line, as seen from an operator-side when the operator grasps and operates the grips.