Provided is a method for manufacturing dried earthworm powder containing high potency enzymes while removing harmful substances contained in the earthworm. The manufacturing method is characterised by: a live earthworm being brought into contact with a chloride of at least one metal selected from the group consisting of potassium, sodium, magnesium and calcium； followed by the live earthworm being brought into contact with a hydroxy carboxylic acid powder, diluted with water to adjust to a pH of 2-5, and preserved for 3-180 minutes； and the live earthworm being washed with water and ground, and the obtained ground material being freeze-dried.
