A binding machine includes a wire feeding unit, a curl forming unit, a cutting unit, a binding unit, and a transmission unit that transmits movement of the binding unit to the cutting unit. The binding unit includes a locking member that locks a wire, a sleeve that actuates the locking member, and a rotary shaft that actuates the sleeve. The transmission unit includes a displacement member to be displaced by movement of the sleeve, and a transmission member that transmits movement of the displacement member to the cutting unit. The cutting unit includes a movable blade part connected to the transmission member. The displacement member switches an amount of movement of the movable blade part and a force that can be generated by the movable blade part, within a moving range of the movable blade part.