A plasma etching method includes a first step of attracting a substrate onto a monopolar electrostatic chuck in a first plasma, which is a plasma of a noble gas, and stopping generation of the first plasma after the attracting of the substrate, and a second step of etching the substrate in a second plasma, which is a plasma of a halogen-based etching gas, and stopping generation of the second plasma after the etching of the substrate. In the first step, the generation of the first plasma is stopped when a positive voltage is applied from the monopolar electrostatic chuck to the substrate. In the second step, the generation of the second plasma is stopped when a negative voltage is applied from the monopolar electrostatic chuck to the substrate.