To provide a method for refining a quartz glass raw material powder, by which insulating impurity particles are separated and removed from the quartz glass raw material powder in which the insulating impurity particles are mixed.

The method for refining a quartz glass raw material powder includes: a step (S1) for heating the quartz glass raw material powder in which insulating impurity particles are mixed in quartz powder to carbonize the insulating impurity particles into carbonized impurity particles; a step (S2) for electrifying the quartz glass raw material powder in which the carbonized impurity particles are mixed; and a step (S3) for separating the quartz powder from the carbonized impurity particles by passing the electrified quartz glass raw material powder through between a couple of positive and negative electrodes arranged opposite to each other.